bitque/jirs-css/src/colors.rs

use std::str::FromStr;

/// rgba(255, 255, 255, 1.0)
/// 012345
/// rgb(255, 255, 255, 1.0)
/// 01234
pub fn parse_rgba(s: &str, parse_alpha: bool) -> Result<(u8, u8, u8, u8), String> {
    let start_idx = if parse_alpha { 5 } else { 4 };
    let v: Vec<String> = s[start_idx..(s.len() - 1)]
        .split(',')
        .map(|s| s.to_string())
        .collect();
    let r = v
        .get(0)
        .ok_or_else(|| format!("invalid color {:?}", s))
        .and_then(|s| s.parse().map_err(|_| format!("invalid color {:?}", s)))?;
    let g = v
        .get(1)
        .ok_or_else(|| format!("invalid color {:?}", s))
        .and_then(|s| s.parse().map_err(|_| format!("invalid color {:?}", s)))?;
    let b = v
        .get(2)
        .ok_or_else(|| format!("invalid color {:?}", s))
        .and_then(|s| s.parse().map_err(|_| format!("invalid color {:?}", s)))?;
    let a = if parse_alpha {
        (v.get(3)
            .ok_or_else(|| format!("invalid color {:?}", s))
            .and_then(|s| {
                s.parse::<f64>()
                    .map_err(|_| format!("invalid color {:?}", s))
            })?
            * 255f64) as u8
    } else {
        255
    };
    Ok((r, g, b, a))
}

/// hsla(360, 100%, 100%, 1.0)
/// 012345
/// hsl(360, 100%, 100%, 1.0)
/// 01234
pub fn parse_hsla(given: &str, parse_alpha: bool) -> Result<(u16, u8, u8, f64), String> {
    let start_idx = if parse_alpha { 5 } else { 4 };
    let v: Vec<String> = given[start_idx..(given.len() - 1)]
        .split(',')
        .map(|s| s.to_string())
        .collect();
    let h = v
        .get(0)
        .ok_or_else(|| format!("invalid color {:?}", given))
        .and_then(|s| s.parse().map_err(|_| format!("invalid color {:?}", given)))?;
    let s = parse_percent(given, v.get(1))?;
    let l = parse_percent(given, v.get(2))?;
    let a = if parse_alpha {
        v.get(3)
            .ok_or_else(|| format!("invalid color {:?}", given))
            .and_then(|s| {
                s.parse::<f64>()
                    .map_err(|_| format!("invalid color {:?}", given))
            })?
    } else {
        1.0f64
    };
    Ok((h, s, l, a))
}

fn parse_percent(s: &str, v: Option<&String>) -> Result<u8, String> {
    v.ok_or_else(|| format!("invalid color {:?}", s))
        .and_then(|s| {
            if s.ends_with('%') {
                Ok(s[0..(s.len() - 1)].to_string())
            } else {
                Err(format!("invalid color {:?}", s))
            }
        })
        .and_then(|s| {
            s.parse::<u8>()
                .map_err(|_| format!("invalid color {:?}", s))
        })
}

pub enum Color {
    AliceBlue,
    AntiqueWhite,
    Aqua,
    Aquamarine,
    Azure,
    Beige,
    Bisque,
    Black,
    BlanchedAlmond,
    Blue,
    BlueViolet,
    Brown,
    BurlyWood,
    CadetBlue,
    Chartreuse,
    Chocolate,
    Coral,
    CornflowerBlue,
    Cornsilk,
    Crimson,
    Cyan,
    DarkBlue,
    DarkCyan,
    DarkGoldenRod,
    DarkGray,
    DarkGrey,
    DarkGreen,
    DarkKhaki,
    DarkMagenta,
    DarkOliveGreen,
    DarkOrange,
    DarkOrchid,
    DarkRed,
    DarkSalmon,
    DarkSeaGreen,
    DarkSlateBlue,
    DarkSlateGray,
    DarkSlateGrey,
    DarkTurquoise,
    DarkViolet,
    DeepPink,
    DeepSkyBlue,
    DimGray,
    DimGrey,
    DodgerBlue,
    FireBrick,
    FloralWhite,
    ForestGreen,
    Fuchsia,
    Gainsboro,
    GhostWhite,
    Gold,
    GoldenRod,
    Gray,
    Grey,
    Green,
    GreenYellow,
    HoneyDew,
    HotPink,
    IndianRed,
    Indigo,
    Ivory,
    Khaki,
    Lavender,
    LavenderBlush,
    LawnGreen,
    LemonChiffon,
    LightBlue,
    LightCoral,
    LightCyan,
    LightGoldenRodYellow,
    LightGray,
    LightGrey,
    LightGreen,
    LightPink,
    LightSalmon,
    LightSeaGreen,
    LightSkyBlue,
    LightSlateGray,
    LightSlateGrey,
    LightSteelBlue,
    LightYellow,
    Lime,
    LimeGreen,
    Linen,
    Magenta,
    Maroon,
    MediumAquaMarine,
    MediumBlue,
    MediumOrchid,
    MediumPurple,
    MediumSeaGreen,
    MediumSlateBlue,
    MediumSpringGreen,
    MediumTurquoise,
    MediumVioletRed,
    MidnightBlue,
    MintCream,
    MistyRose,
    Moccasin,
    NavajoWhite,
    Navy,
    OldLace,
    Olive,
    OliveDrab,
    Orange,
    OrangeRed,
    Orchid,
    PaleGoldenRod,
    PaleGreen,
    PaleTurquoise,
    PaleVioletRed,
    PapayaWhip,
    PeachPuff,
    Peru,
    Pink,
    Plum,
    PowderBlue,
    Purple,
    RebeccaPurple,
    Red,
    RosyBrown,
    RoyalBlue,
    SaddleBrown,
    Salmon,
    SandyBrown,
    SeaGreen,
    SeaShell,
    Sienna,
    Silver,
    SkyBlue,
    SlateBlue,
    SlateGray,
    SlateGrey,
    Snow,
    SpringGreen,
    SteelBlue,
    Tan,
    Teal,
    Thistle,
    Tomato,
    Turquoise,
    Violet,
    Wheat,
    White,
    WhiteSmoke,
    Yellow,
    YellowGreen,
}

impl ToString for Color {
    fn to_string(&self) -> String {
        match self {
            Color::AliceBlue => "AliceBlue",
            Color::AntiqueWhite => "AntiqueWhite",
            Color::Aqua => "Aqua",
            Color::Aquamarine => "Aquamarine",
            Color::Azure => "Azure",
            Color::Beige => "Beige",
            Color::Bisque => "Bisque",
            Color::Black => "Black",
            Color::BlanchedAlmond => "BlanchedAlmond",
            Color::Blue => "Blue",
            Color::BlueViolet => "BlueViolet",
            Color::Brown => "Brown",
            Color::BurlyWood => "BurlyWood",
            Color::CadetBlue => "CadetBlue",
            Color::Chartreuse => "Chartreuse",
            Color::Chocolate => "Chocolate",
            Color::Coral => "Coral",
            Color::CornflowerBlue => "CornflowerBlue",
            Color::Cornsilk => "Cornsilk",
            Color::Crimson => "Crimson",
            Color::Cyan => "Cyan",
            Color::DarkBlue => "DarkBlue",
            Color::DarkCyan => "DarkCyan",
            Color::DarkGoldenRod => "DarkGoldenRod",
            Color::DarkGray => "DarkGray",
            Color::DarkGrey => "DarkGrey",
            Color::DarkGreen => "DarkGreen",
            Color::DarkKhaki => "DarkKhaki",
            Color::DarkMagenta => "DarkMagenta",
            Color::DarkOliveGreen => "DarkOliveGreen",
            Color::DarkOrange => "DarkOrange",
            Color::DarkOrchid => "DarkOrchid",
            Color::DarkRed => "DarkRed",
            Color::DarkSalmon => "DarkSalmon",
            Color::DarkSeaGreen => "DarkSeaGreen",
            Color::DarkSlateBlue => "DarkSlateBlue",
            Color::DarkSlateGray => "DarkSlateGray",
            Color::DarkSlateGrey => "DarkSlateGrey",
            Color::DarkTurquoise => "DarkTurquoise",
            Color::DarkViolet => "DarkViolet",
            Color::DeepPink => "DeepPink",
            Color::DeepSkyBlue => "DeepSkyBlue",
            Color::DimGray => "DimGray",
            Color::DimGrey => "DimGrey",
            Color::DodgerBlue => "DodgerBlue",
            Color::FireBrick => "FireBrick",
            Color::FloralWhite => "FloralWhite",
            Color::ForestGreen => "ForestGreen",
            Color::Fuchsia => "Fuchsia",
            Color::Gainsboro => "Gainsboro",
            Color::GhostWhite => "GhostWhite",
            Color::Gold => "Gold",
            Color::GoldenRod => "GoldenRod",
            Color::Gray => "Gray",
            Color::Grey => "Grey",
            Color::Green => "Green",
            Color::GreenYellow => "GreenYellow",
            Color::HoneyDew => "HoneyDew",
            Color::HotPink => "HotPink",
            Color::IndianRed => "IndianRed",
            Color::Indigo => "Indigo",
            Color::Ivory => "Ivory",
            Color::Khaki => "Khaki",
            Color::Lavender => "Lavender",
            Color::LavenderBlush => "LavenderBlush",
            Color::LawnGreen => "LawnGreen",
            Color::LemonChiffon => "LemonChiffon",
            Color::LightBlue => "LightBlue",
            Color::LightCoral => "LightCoral",
            Color::LightCyan => "LightCyan",
            Color::LightGoldenRodYellow => "LightGoldenRodYellow",
            Color::LightGray => "LightGray",
            Color::LightGrey => "LightGrey",
            Color::LightGreen => "LightGreen",
            Color::LightPink => "LightPink",
            Color::LightSalmon => "LightSalmon",
            Color::LightSeaGreen => "LightSeaGreen",
            Color::LightSkyBlue => "LightSkyBlue",
            Color::LightSlateGray => "LightSlateGray",
            Color::LightSlateGrey => "LightSlateGrey",
            Color::LightSteelBlue => "LightSteelBlue",
            Color::LightYellow => "LightYellow",
            Color::Lime => "Lime",
            Color::LimeGreen => "LimeGreen",
            Color::Linen => "Linen",
            Color::Magenta => "Magenta",
            Color::Maroon => "Maroon",
            Color::MediumAquaMarine => "MediumAquaMarine",
            Color::MediumBlue => "MediumBlue",
            Color::MediumOrchid => "MediumOrchid",
            Color::MediumPurple => "MediumPurple",
            Color::MediumSeaGreen => "MediumSeaGreen",
            Color::MediumSlateBlue => "MediumSlateBlue",
            Color::MediumSpringGreen => "MediumSpringGreen",
            Color::MediumTurquoise => "MediumTurquoise",
            Color::MediumVioletRed => "MediumVioletRed",
            Color::MidnightBlue => "MidnightBlue",
            Color::MintCream => "MintCream",
            Color::MistyRose => "MistyRose",
            Color::Moccasin => "Moccasin",
            Color::NavajoWhite => "NavajoWhite",
            Color::Navy => "Navy",
            Color::OldLace => "OldLace",
            Color::Olive => "Olive",
            Color::OliveDrab => "OliveDrab",
            Color::Orange => "Orange",
            Color::OrangeRed => "OrangeRed",
            Color::Orchid => "Orchid",
            Color::PaleGoldenRod => "PaleGoldenRod",
            Color::PaleGreen => "PaleGreen",
            Color::PaleTurquoise => "PaleTurquoise",
            Color::PaleVioletRed => "PaleVioletRed",
            Color::PapayaWhip => "PapayaWhip",
            Color::PeachPuff => "PeachPuff",
            Color::Peru => "Peru",
            Color::Pink => "Pink",
            Color::Plum => "Plum",
            Color::PowderBlue => "PowderBlue",
            Color::Purple => "Purple",
            Color::RebeccaPurple => "RebeccaPurple",
            Color::Red => "Red",
            Color::RosyBrown => "RosyBrown",
            Color::RoyalBlue => "RoyalBlue",
            Color::SaddleBrown => "SaddleBrown",
            Color::Salmon => "Salmon",
            Color::SandyBrown => "SandyBrown",
            Color::SeaGreen => "SeaGreen",
            Color::SeaShell => "SeaShell",
            Color::Sienna => "Sienna",
            Color::Silver => "Silver",
            Color::SkyBlue => "SkyBlue",
            Color::SlateBlue => "SlateBlue",
            Color::SlateGray => "SlateGray",
            Color::SlateGrey => "SlateGrey",
            Color::Snow => "Snow",
            Color::SpringGreen => "SpringGreen",
            Color::SteelBlue => "SteelBlue",
            Color::Tan => "Tan",
            Color::Teal => "Teal",
            Color::Thistle => "Thistle",
            Color::Tomato => "Tomato",
            Color::Turquoise => "Turquoise",
            Color::Violet => "Violet",
            Color::Wheat => "Wheat",
            Color::White => "White",
            Color::WhiteSmoke => "WhiteSmoke",
            Color::Yellow => "Yellow",
            Color::YellowGreen => "YellowGreen",
        }
        .to_string()
    }
}

impl Color {
    pub fn to_hex(&self) -> String {
        match self {
            Color::AliceBlue => "#f0f8ff",
            Color::AntiqueWhite => "#faebd7",
            Color::Aqua => "#00ffff",
            Color::Aquamarine => "#7fffd4",
            Color::Azure => "#f0ffff",
            Color::Beige => "#f5f5dc",
            Color::Bisque => "#ffe4c4",
            Color::Black => "#000000",
            Color::BlanchedAlmond => "#ffebcd",
            Color::Blue => "#0000ff",
            Color::BlueViolet => "#8a2be2",
            Color::Brown => "#a52a2a",
            Color::BurlyWood => "#deb887",
            Color::CadetBlue => "#5f9ea0",
            Color::Chartreuse => "#7fff00",
            Color::Chocolate => "#d2691e",
            Color::Coral => "#ff7f50",
            Color::CornflowerBlue => "#6495ed",
            Color::Cornsilk => "#fff8dc",
            Color::Crimson => "#dc143c",
            Color::Cyan => "#00ffff",
            Color::DarkBlue => "#00008b",
            Color::DarkCyan => "#008b8b",
            Color::DarkGoldenRod => "#b8860b",
            Color::DarkGray => "#a9a9a9",
            Color::DarkGrey => "#a9a9a9",
            Color::DarkGreen => "#006400",
            Color::DarkKhaki => "#bdb76b",
            Color::DarkMagenta => "#8b008b",
            Color::DarkOliveGreen => "#556b2f",
            Color::DarkOrange => "#ff8c00",
            Color::DarkOrchid => "#9932cc",
            Color::DarkRed => "#8b0000",
            Color::DarkSalmon => "#e9967a",
            Color::DarkSeaGreen => "#8fbc8f",
            Color::DarkSlateBlue => "#483d8b",
            Color::DarkSlateGray => "#2f4f4f",
            Color::DarkSlateGrey => "#2f4f4f",
            Color::DarkTurquoise => "#00ced1",
            Color::DarkViolet => "#9400d3",
            Color::DeepPink => "#ff1493",
            Color::DeepSkyBlue => "#00bfff",
            Color::DimGray => "#696969",
            Color::DimGrey => "#696969",
            Color::DodgerBlue => "#1e90ff",
            Color::FireBrick => "#b22222",
            Color::FloralWhite => "#fffaf0",
            Color::ForestGreen => "#228b22",
            Color::Fuchsia => "#ff00ff",
            Color::Gainsboro => "#dcdcdc",
            Color::GhostWhite => "#f8f8ff",
            Color::Gold => "#ffd700",
            Color::GoldenRod => "#daa520",
            Color::Gray => "#808080",
            Color::Grey => "#808080",
            Color::Green => "#008000",
            Color::GreenYellow => "#adff2f",
            Color::HoneyDew => "#f0fff0",
            Color::HotPink => "#ff69b4",
            Color::IndianRed => "#cd5c5c",
            Color::Indigo => "#4b0082",
            Color::Ivory => "#fffff0",
            Color::Khaki => "#f0e68c",
            Color::Lavender => "#e6e6fa",
            Color::LavenderBlush => "#fff0f5",
            Color::LawnGreen => "#7cfc00",
            Color::LemonChiffon => "#fffacd",
            Color::LightBlue => "#add8e6",
            Color::LightCoral => "#f08080",
            Color::LightCyan => "#e0ffff",
            Color::LightGoldenRodYellow => "#fafad2",
            Color::LightGray => "#d3d3d3",
            Color::LightGrey => "#d3d3d3",
            Color::LightGreen => "#90ee90",
            Color::LightPink => "#ffb6c1",
            Color::LightSalmon => "#ffa07a",
            Color::LightSeaGreen => "#20b2aa",
            Color::LightSkyBlue => "#87cefa",
            Color::LightSlateGray => "#778899",
            Color::LightSlateGrey => "#778899",
            Color::LightSteelBlue => "#b0c4de",
            Color::LightYellow => "#ffffe0",
            Color::Lime => "#00ff00",
            Color::LimeGreen => "#32cd32",
            Color::Linen => "#faf0e6",
            Color::Magenta => "#ff00ff",
            Color::Maroon => "#800000",
            Color::MediumAquaMarine => "#66cdaa",
            Color::MediumBlue => "#0000cd",
            Color::MediumOrchid => "#ba55d3",
            Color::MediumPurple => "#9370db",
            Color::MediumSeaGreen => "#3cb371",
            Color::MediumSlateBlue => "#7b68ee",
            Color::MediumSpringGreen => "#00fa9a",
            Color::MediumTurquoise => "#48d1cc",
            Color::MediumVioletRed => "#c71585",
            Color::MidnightBlue => "#191970",
            Color::MintCream => "#f5fffa",
            Color::MistyRose => "#ffe4e1",
            Color::Moccasin => "#ffe4b5",
            Color::NavajoWhite => "#ffdead",
            Color::Navy => "#000080",
            Color::OldLace => "#fdf5e6",
            Color::Olive => "#808000",
            Color::OliveDrab => "#6b8e23",
            Color::Orange => "#ffa500",
            Color::OrangeRed => "#ff4500",
            Color::Orchid => "#da70d6",
            Color::PaleGoldenRod => "#eee8aa",
            Color::PaleGreen => "#98fb98",
            Color::PaleTurquoise => "#afeeee",
            Color::PaleVioletRed => "#db7093",
            Color::PapayaWhip => "#ffefd5",
            Color::PeachPuff => "#ffdab9",
            Color::Peru => "#cd853f",
            Color::Pink => "#ffc0cb",
            Color::Plum => "#dda0dd",
            Color::PowderBlue => "#b0e0e6",
            Color::Purple => "#800080",
            Color::RebeccaPurple => "#663399",
            Color::Red => "#ff0000",
            Color::RosyBrown => "#bc8f8f",
            Color::RoyalBlue => "#4169e1",
            Color::SaddleBrown => "#8b4513",
            Color::Salmon => "#fa8072",
            Color::SandyBrown => "#f4a460",
            Color::SeaGreen => "#2e8b57",
            Color::SeaShell => "#fff5ee",
            Color::Sienna => "#a0522d",
            Color::Silver => "#c0c0c0",
            Color::SkyBlue => "#87ceeb",
            Color::SlateBlue => "#6a5acd",
            Color::SlateGray => "#708090",
            Color::SlateGrey => "#708090",
            Color::Snow => "#fffafa",
            Color::SpringGreen => "#00ff7f",
            Color::SteelBlue => "#4682b4",
            Color::Tan => "#d2b48c",
            Color::Teal => "#008080",
            Color::Thistle => "#d8bfd8",
            Color::Tomato => "#ff6347",
            Color::Turquoise => "#40e0d0",
            Color::Violet => "#ee82ee",
            Color::Wheat => "#f5deb3",
            Color::White => "#ffffff",
            Color::WhiteSmoke => "#f5f5f5",
            Color::Yellow => "#ffff00",
            Color::YellowGreen => "#9acd32",
        }
        .to_string()
    }
}

impl FromStr for Color {
    type Err = String;

    fn from_str(s: &str) -> Result<Self, Self::Err> {
        let m = if s.starts_with('#') {
            s.to_lowercase()
        } else {
            s.to_string()
        };
        let c = match m.as_str() {
            "AliceBlue" | "#f0f8ff" => Color::AliceBlue,
            "AntiqueWhite" | "#faebd7" => Color::AntiqueWhite,
            "Aqua" | "#00ffff" => Color::Aqua,
            "Aquamarine" | "#7fffd4" => Color::Aquamarine,
            "Azure" | "#f0ffff" => Color::Azure,
            "Beige" | "#f5f5dc" => Color::Beige,
            "Bisque" | "#ffe4c4" => Color::Bisque,
            "Black" | "#000000" => Color::Black,
            "BlanchedAlmond" | "#ffebcd" => Color::BlanchedAlmond,
            "Blue" | "#0000ff" => Color::Blue,
            "BlueViolet" | "#8a2be2" => Color::BlueViolet,
            "Brown" | "#a52a2a" => Color::Brown,
            "BurlyWood" | "#deb887" => Color::BurlyWood,
            "CadetBlue" | "#5f9ea0" => Color::CadetBlue,
            "Chartreuse" | "#7fff00" => Color::Chartreuse,
            "Chocolate" | "#d2691e" => Color::Chocolate,
            "Coral" | "#ff7f50" => Color::Coral,
            "CornflowerBlue" | "#6495ed" => Color::CornflowerBlue,
            "Cornsilk" | "#fff8dc" => Color::Cornsilk,
            "Crimson" | "#dc143c" => Color::Crimson,
            "Cyan" | "#00ffff" => Color::Cyan,
            "DarkBlue" | "#00008b" => Color::DarkBlue,
            "DarkCyan" | "#008b8b" => Color::DarkCyan,
            "DarkGoldenRod" | "#b8860b" => Color::DarkGoldenRod,
            "DarkGray" | "#a9a9a9" => Color::DarkGray,
            "DarkGrey" | "#a9a9a9" => Color::DarkGrey,
            "DarkGreen" | "#006400" => Color::DarkGreen,
            "DarkKhaki" | "#bdb76b" => Color::DarkKhaki,
            "DarkMagenta" | "#8b008b" => Color::DarkMagenta,
            "DarkOliveGreen" | "#556b2f" => Color::DarkOliveGreen,
            "DarkOrange" | "#ff8c00" => Color::DarkOrange,
            "DarkOrchid" | "#9932cc" => Color::DarkOrchid,
            "DarkRed" | "#8b0000" => Color::DarkRed,
            "DarkSalmon" | "#e9967a" => Color::DarkSalmon,
            "DarkSeaGreen" | "#8fbc8f" => Color::DarkSeaGreen,
            "DarkSlateBlue" | "#483d8b" => Color::DarkSlateBlue,
            "DarkSlateGray" | "#2f4f4f" => Color::DarkSlateGray,
            "DarkSlateGrey" | "#2f4f4f" => Color::DarkSlateGrey,
            "DarkTurquoise" | "#00ced1" => Color::DarkTurquoise,
            "DarkViolet" | "#9400d3" => Color::DarkViolet,
            "DeepPink" | "#ff1493" => Color::DeepPink,
            "DeepSkyBlue" | "#00bfff" => Color::DeepSkyBlue,
            "DimGray" | "#696969" => Color::DimGray,
            "DimGrey" | "#696969" => Color::DimGrey,
            "DodgerBlue" | "#1e90ff" => Color::DodgerBlue,
            "FireBrick" | "#b22222" => Color::FireBrick,
            "FloralWhite" | "#fffaf0" => Color::FloralWhite,
            "ForestGreen" | "#228b22" => Color::ForestGreen,
            "Fuchsia" | "#ff00ff" => Color::Fuchsia,
            "Gainsboro" | "#dcdcdc" => Color::Gainsboro,
            "GhostWhite" | "#f8f8ff" => Color::GhostWhite,
            "Gold" | "#ffd700" => Color::Gold,
            "GoldenRod" | "#daa520" => Color::GoldenRod,
            "Gray" | "#808080" => Color::Gray,
            "Grey" | "#808080" => Color::Grey,
            "Green" | "#008000" => Color::Green,
            "GreenYellow" | "#adff2f" => Color::GreenYellow,
            "HoneyDew" | "#f0fff0" => Color::HoneyDew,
            "HotPink" | "#ff69b4" => Color::HotPink,
            "IndianRed" | "#cd5c5c" => Color::IndianRed,
            "Indigo" | "#4b0082" => Color::Indigo,
            "Ivory" | "#fffff0" => Color::Ivory,
            "Khaki" | "#f0e68c" => Color::Khaki,
            "Lavender" | "#e6e6fa" => Color::Lavender,
            "LavenderBlush" | "#fff0f5" => Color::LavenderBlush,
            "LawnGreen" | "#7cfc00" => Color::LawnGreen,
            "LemonChiffon" | "#fffacd" => Color::LemonChiffon,
            "LightBlue" | "#add8e6" => Color::LightBlue,
            "LightCoral" | "#f08080" => Color::LightCoral,
            "LightCyan" | "#e0ffff" => Color::LightCyan,
            "LightGoldenRodYellow" | "#fafad2" => Color::LightGoldenRodYellow,
            "LightGray" | "#d3d3d3" => Color::LightGray,
            "LightGrey" | "#d3d3d3" => Color::LightGrey,
            "LightGreen" | "#90ee90" => Color::LightGreen,
            "LightPink" | "#ffb6c1" => Color::LightPink,
            "LightSalmon" | "#ffa07a" => Color::LightSalmon,
            "LightSeaGreen" | "#20b2aa" => Color::LightSeaGreen,
            "LightSkyBlue" | "#87cefa" => Color::LightSkyBlue,
            "LightSlateGray" | "#778899" => Color::LightSlateGray,
            "LightSlateGrey" | "#778899" => Color::LightSlateGrey,
            "LightSteelBlue" | "#b0c4de" => Color::LightSteelBlue,
            "LightYellow" | "#ffffe0" => Color::LightYellow,
            "Lime" | "#00ff00" => Color::Lime,
            "LimeGreen" | "#32cd32" => Color::LimeGreen,
            "Linen" | "#faf0e6" => Color::Linen,
            "Magenta" | "#ff00ff" => Color::Magenta,
            "Maroon" | "#800000" => Color::Maroon,
            "MediumAquaMarine" | "#66cdaa" => Color::MediumAquaMarine,
            "MediumBlue" | "#0000cd" => Color::MediumBlue,
            "MediumOrchid" | "#ba55d3" => Color::MediumOrchid,
            "MediumPurple" | "#9370db" => Color::MediumPurple,
            "MediumSeaGreen" | "#3cb371" => Color::MediumSeaGreen,
            "MediumSlateBlue" | "#7b68ee" => Color::MediumSlateBlue,
            "MediumSpringGreen" | "#00fa9a" => Color::MediumSpringGreen,
            "MediumTurquoise" | "#48d1cc" => Color::MediumTurquoise,
            "MediumVioletRed" | "#c71585" => Color::MediumVioletRed,
            "MidnightBlue" | "#191970" => Color::MidnightBlue,
            "MintCream" | "#f5fffa" => Color::MintCream,
            "MistyRose" | "#ffe4e1" => Color::MistyRose,
            "Moccasin" | "#ffe4b5" => Color::Moccasin,
            "NavajoWhite" | "#ffdead" => Color::NavajoWhite,
            "Navy" | "#000080" => Color::Navy,
            "OldLace" | "#fdf5e6" => Color::OldLace,
            "Olive" | "#808000" => Color::Olive,
            "OliveDrab" | "#6b8e23" => Color::OliveDrab,
            "Orange" | "#ffa500" => Color::Orange,
            "OrangeRed" | "#ff4500" => Color::OrangeRed,
            "Orchid" | "#da70d6" => Color::Orchid,
            "PaleGoldenRod" | "#eee8aa" => Color::PaleGoldenRod,
            "PaleGreen" | "#98fb98" => Color::PaleGreen,
            "PaleTurquoise" | "#afeeee" => Color::PaleTurquoise,
            "PaleVioletRed" | "#db7093" => Color::PaleVioletRed,
            "PapayaWhip" | "#ffefd5" => Color::PapayaWhip,
            "PeachPuff" | "#ffdab9" => Color::PeachPuff,
            "Peru" | "#cd853f" => Color::Peru,
            "Pink" | "#ffc0cb" => Color::Pink,
            "Plum" | "#dda0dd" => Color::Plum,
            "PowderBlue" | "#b0e0e6" => Color::PowderBlue,
            "Purple" | "#800080" => Color::Purple,
            "RebeccaPurple" | "#663399" => Color::RebeccaPurple,
            "Red" | "#ff0000" => Color::Red,
            "RosyBrown" | "#bc8f8f" => Color::RosyBrown,
            "RoyalBlue" | "#4169e1" => Color::RoyalBlue,
            "SaddleBrown" | "#8b4513" => Color::SaddleBrown,
            "Salmon" | "#fa8072" => Color::Salmon,
            "SandyBrown" | "#f4a460" => Color::SandyBrown,
            "SeaGreen" | "#2e8b57" => Color::SeaGreen,
            "SeaShell" | "#fff5ee" => Color::SeaShell,
            "Sienna" | "#a0522d" => Color::Sienna,
            "Silver" | "#c0c0c0" => Color::Silver,
            "SkyBlue" | "#87ceeb" => Color::SkyBlue,
            "SlateBlue" | "#6a5acd" => Color::SlateBlue,
            "SlateGray" | "#708090" => Color::SlateGray,
            "SlateGrey" | "#708090" => Color::SlateGrey,
            "Snow" | "#fffafa" => Color::Snow,
            "SpringGreen" | "#00ff7f" => Color::SpringGreen,
            "SteelBlue" | "#4682b4" => Color::SteelBlue,
            "Tan" | "#d2b48c" => Color::Tan,
            "Teal" | "#008080" => Color::Teal,
            "Thistle" | "#d8bfd8" => Color::Thistle,
            "Tomato" | "#ff6347" => Color::Tomato,
            "Turquoise" | "#40e0d0" => Color::Turquoise,
            "Violet" | "#ee82ee" => Color::Violet,
            "Wheat" | "#f5deb3" => Color::Wheat,
            "White" | "#ffffff" => Color::White,
            "WhiteSmoke" | "#f5f5f5" => Color::WhiteSmoke,
            "Yellow" | "#ffff00" => Color::Yellow,
            "YellowGreen" | "#9acd32" => Color::YellowGreen,
            _ => return Err(format!("invalid predefined color {:?}", s)),
        };
        Ok(c)
    }
}