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//! Define the colors of a theme.
use crate::{color, Color};
use once_cell::sync::Lazy;
use palette::color_difference::Wcag21RelativeContrast;
use palette::rgb::Rgb;
use palette::{FromColor, Hsl, Mix};
/// A color palette.
#[derive(Debug, Clone, Copy, PartialEq)]
pub struct Palette {
/// The background [`Color`] of the [`Palette`].
pub background: Color,
/// The text [`Color`] of the [`Palette`].
pub text: Color,
/// The primary [`Color`] of the [`Palette`].
pub primary: Color,
/// The success [`Color`] of the [`Palette`].
pub success: Color,
/// The danger [`Color`] of the [`Palette`].
pub danger: Color,
}
impl Palette {
/// The built-in light variant of a [`Palette`].
pub const LIGHT: Self = Self {
background: Color::WHITE,
text: Color::BLACK,
primary: Color::from_rgb(
0x5E as f32 / 255.0,
0x7C as f32 / 255.0,
0xE2 as f32 / 255.0,
),
success: Color::from_rgb(
0x12 as f32 / 255.0,
0x66 as f32 / 255.0,
0x4F as f32 / 255.0,
),
danger: Color::from_rgb(
0xC3 as f32 / 255.0,
0x42 as f32 / 255.0,
0x3F as f32 / 255.0,
),
};
/// The built-in dark variant of a [`Palette`].
pub const DARK: Self = Self {
background: Color::from_rgb(
0x20 as f32 / 255.0,
0x22 as f32 / 255.0,
0x25 as f32 / 255.0,
),
text: Color::from_rgb(0.90, 0.90, 0.90),
primary: Color::from_rgb(
0x5E as f32 / 255.0,
0x7C as f32 / 255.0,
0xE2 as f32 / 255.0,
),
success: Color::from_rgb(
0x12 as f32 / 255.0,
0x66 as f32 / 255.0,
0x4F as f32 / 255.0,
),
danger: Color::from_rgb(
0xC3 as f32 / 255.0,
0x42 as f32 / 255.0,
0x3F as f32 / 255.0,
),
};
/// The built-in [Dracula] variant of a [`Palette`].
///
/// [Dracula]: https://draculatheme.com
pub const DRACULA: Self = Self {
background: color!(0x282A36), // BACKGROUND
text: color!(0xf8f8f2), // FOREGROUND
primary: color!(0xbd93f9), // PURPLE
success: color!(0x50fa7b), // GREEN
danger: color!(0xff5555), // RED
};
/// The built-in [Nord] variant of a [`Palette`].
///
/// [Nord]: https://www.nordtheme.com/docs/colors-and-palettes
pub const NORD: Self = Self {
background: color!(0x2e3440), // nord0
text: color!(0xeceff4), // nord6
primary: color!(0x8fbcbb), // nord7
success: color!(0xa3be8c), // nord14
danger: color!(0xbf616a), // nord11
};
/// The built-in [Solarized] Light variant of a [`Palette`].
///
/// [Solarized]: https://ethanschoonover.com/solarized
pub const SOLARIZED_LIGHT: Self = Self {
background: color!(0xfdf6e3), // base3
text: color!(0x657b83), // base00
primary: color!(0x2aa198), // cyan
success: color!(0x859900), // green
danger: color!(0xdc322f), // red
};
/// The built-in [Solarized] Dark variant of a [`Palette`].
///
/// [Solarized]: https://ethanschoonover.com/solarized
pub const SOLARIZED_DARK: Self = Self {
background: color!(0x002b36), // base03
text: color!(0x839496), // base0
primary: color!(0x2aa198), // cyan
success: color!(0x859900), // green
danger: color!(0xdc322f), // red
};
/// The built-in [Gruvbox] Light variant of a [`Palette`].
///
/// [Gruvbox]: https://github.com/morhetz/gruvbox
pub const GRUVBOX_LIGHT: Self = Self {
background: color!(0xfbf1c7), // light BG_0
text: color!(0x282828), // light FG0_29
primary: color!(0x458588), // light BLUE_4
success: color!(0x98971a), // light GREEN_2
danger: color!(0xcc241d), // light RED_1
};
/// The built-in [Gruvbox] Dark variant of a [`Palette`].
///
/// [Gruvbox]: https://github.com/morhetz/gruvbox
pub const GRUVBOX_DARK: Self = Self {
background: color!(0x282828), // dark BG_0
text: color!(0xfbf1c7), // dark FG0_29
primary: color!(0x458588), // dark BLUE_4
success: color!(0x98971a), // dark GREEN_2
danger: color!(0xcc241d), // dark RED_1
};
/// The built-in [Catppuccin] Latte variant of a [`Palette`].
///
/// [Catppuccin]: https://github.com/catppuccin/catppuccin
pub const CATPPUCCIN_LATTE: Self = Self {
background: color!(0xeff1f5), // Base
text: color!(0x4c4f69), // Text
primary: color!(0x1e66f5), // Blue
success: color!(0x40a02b), // Green
danger: color!(0xd20f39), // Red
};
/// The built-in [Catppuccin] Frappé variant of a [`Palette`].
///
/// [Catppuccin]: https://github.com/catppuccin/catppuccin
pub const CATPPUCCIN_FRAPPE: Self = Self {
background: color!(0x303446), // Base
text: color!(0xc6d0f5), // Text
primary: color!(0x8caaee), // Blue
success: color!(0xa6d189), // Green
danger: color!(0xe78284), // Red
};
/// The built-in [Catppuccin] Macchiato variant of a [`Palette`].
///
/// [Catppuccin]: https://github.com/catppuccin/catppuccin
pub const CATPPUCCIN_MACCHIATO: Self = Self {
background: color!(0x24273a), // Base
text: color!(0xcad3f5), // Text
primary: color!(0x8aadf4), // Blue
success: color!(0xa6da95), // Green
danger: color!(0xed8796), // Red
};
/// The built-in [Catppuccin] Mocha variant of a [`Palette`].
///
/// [Catppuccin]: https://github.com/catppuccin/catppuccin
pub const CATPPUCCIN_MOCHA: Self = Self {
background: color!(0x1e1e2e), // Base
text: color!(0xcdd6f4), // Text
primary: color!(0x89b4fa), // Blue
success: color!(0xa6e3a1), // Green
danger: color!(0xf38ba8), // Red
};
/// The built-in [Tokyo Night] variant of a [`Palette`].
///
/// [Tokyo Night]: https://github.com/enkia/tokyo-night-vscode-theme
pub const TOKYO_NIGHT: Self = Self {
background: color!(0x1a1b26), // Background (Night)
text: color!(0x9aa5ce), // Text
primary: color!(0x2ac3de), // Blue
success: color!(0x9ece6a), // Green
danger: color!(0xf7768e), // Red
};
/// The built-in [Tokyo Night] Storm variant of a [`Palette`].
///
/// [Tokyo Night]: https://github.com/enkia/tokyo-night-vscode-theme
pub const TOKYO_NIGHT_STORM: Self = Self {
background: color!(0x24283b), // Background (Storm)
text: color!(0x9aa5ce), // Text
primary: color!(0x2ac3de), // Blue
success: color!(0x9ece6a), // Green
danger: color!(0xf7768e), // Red
};
/// The built-in [Tokyo Night] Light variant of a [`Palette`].
///
/// [Tokyo Night]: https://github.com/enkia/tokyo-night-vscode-theme
pub const TOKYO_NIGHT_LIGHT: Self = Self {
background: color!(0xd5d6db), // Background
text: color!(0x565a6e), // Text
primary: color!(0x166775), // Blue
success: color!(0x485e30), // Green
danger: color!(0x8c4351), // Red
};
/// The built-in [Kanagawa] Wave variant of a [`Palette`].
///
/// [Kanagawa]: https://github.com/rebelot/kanagawa.nvim
pub const KANAGAWA_WAVE: Self = Self {
background: color!(0x363646), // Sumi Ink 3
text: color!(0xCD7BA), // Fuji White
primary: color!(0x2D4F67), // Wave Blue 2
success: color!(0x76946A), // Autumn Green
danger: color!(0xC34043), // Autumn Red
};
/// The built-in [Kanagawa] Dragon variant of a [`Palette`].
///
/// [Kanagawa]: https://github.com/rebelot/kanagawa.nvim
pub const KANAGAWA_DRAGON: Self = Self {
background: color!(0x181616), // Dragon Black 3
text: color!(0xc5c9c5), // Dragon White
primary: color!(0x223249), // Wave Blue 1
success: color!(0x8a9a7b), // Dragon Green 2
danger: color!(0xc4746e), // Dragon Red
};
/// The built-in [Kanagawa] Lotus variant of a [`Palette`].
///
/// [Kanagawa]: https://github.com/rebelot/kanagawa.nvim
pub const KANAGAWA_LOTUS: Self = Self {
background: color!(0xf2ecbc), // Lotus White 3
text: color!(0x545464), // Lotus Ink 1
primary: color!(0xc9cbd1), // Lotus Violet 3
success: color!(0x6f894e), // Lotus Green
danger: color!(0xc84053), // Lotus Red
};
/// The built-in [Moonfly] variant of a [`Palette`].
///
/// [Moonfly]: https://github.com/bluz71/vim-moonfly-colors
pub const MOONFLY: Self = Self {
background: color!(0x080808), // Background
text: color!(0xbdbdbd), // Foreground
primary: color!(0x80a0ff), // Blue (normal)
success: color!(0x8cc85f), // Green (normal)
danger: color!(0xff5454), // Red (normal)
};
/// The built-in [Nightfly] variant of a [`Palette`].
///
/// [Nightfly]: https://github.com/bluz71/vim-nightfly-colors
pub const NIGHTFLY: Self = Self {
background: color!(0x011627), // Background
text: color!(0xbdc1c6), // Foreground
primary: color!(0x82aaff), // Blue (normal)
success: color!(0xa1cd5e), // Green (normal)
danger: color!(0xfc514e), // Red (normal)
};
/// The built-in [Oxocarbon] variant of a [`Palette`].
///
/// [Oxocarbon]: https://github.com/nyoom-engineering/oxocarbon.nvim
pub const OXOCARBON: Self = Self {
background: color!(0x232323),
text: color!(0xd0d0d0),
primary: color!(0x00b4ff),
success: color!(0x00c15a),
danger: color!(0xf62d0f),
};
/// The built-in [Ferra] variant of a [`Palette`].
///
/// [Ferra]: https://github.com/casperstorm/ferra
pub const FERRA: Self = Self {
background: color!(0x2b292d),
text: color!(0xfecdb2),
primary: color!(0xd1d1e0),
success: color!(0xb1b695),
danger: color!(0xe06b75),
};
}
/// An extended set of colors generated from a [`Palette`].
#[derive(Debug, Clone, Copy, PartialEq)]
pub struct Extended {
/// The set of background colors.
pub background: Background,
/// The set of primary colors.
pub primary: Primary,
/// The set of secondary colors.
pub secondary: Secondary,
/// The set of success colors.
pub success: Success,
/// The set of danger colors.
pub danger: Danger,
/// Whether the palette is dark or not.
pub is_dark: bool,
}
/// The built-in light variant of an [`Extended`] palette.
pub static EXTENDED_LIGHT: Lazy<Extended> =
Lazy::new(|| Extended::generate(Palette::LIGHT));
/// The built-in dark variant of an [`Extended`] palette.
pub static EXTENDED_DARK: Lazy<Extended> =
Lazy::new(|| Extended::generate(Palette::DARK));
/// The built-in Dracula variant of an [`Extended`] palette.
pub static EXTENDED_DRACULA: Lazy<Extended> =
Lazy::new(|| Extended::generate(Palette::DRACULA));
/// The built-in Nord variant of an [`Extended`] palette.
pub static EXTENDED_NORD: Lazy<Extended> =
Lazy::new(|| Extended::generate(Palette::NORD));
/// The built-in Solarized Light variant of an [`Extended`] palette.
pub static EXTENDED_SOLARIZED_LIGHT: Lazy<Extended> =
Lazy::new(|| Extended::generate(Palette::SOLARIZED_LIGHT));
/// The built-in Solarized Dark variant of an [`Extended`] palette.
pub static EXTENDED_SOLARIZED_DARK: Lazy<Extended> =
Lazy::new(|| Extended::generate(Palette::SOLARIZED_DARK));
/// The built-in Gruvbox Light variant of an [`Extended`] palette.
pub static EXTENDED_GRUVBOX_LIGHT: Lazy<Extended> =
Lazy::new(|| Extended::generate(Palette::GRUVBOX_LIGHT));
/// The built-in Gruvbox Dark variant of an [`Extended`] palette.
pub static EXTENDED_GRUVBOX_DARK: Lazy<Extended> =
Lazy::new(|| Extended::generate(Palette::GRUVBOX_DARK));
/// The built-in Catppuccin Latte variant of an [`Extended`] palette.
pub static EXTENDED_CATPPUCCIN_LATTE: Lazy<Extended> =
Lazy::new(|| Extended::generate(Palette::CATPPUCCIN_LATTE));
/// The built-in Catppuccin Frappé variant of an [`Extended`] palette.
pub static EXTENDED_CATPPUCCIN_FRAPPE: Lazy<Extended> =
Lazy::new(|| Extended::generate(Palette::CATPPUCCIN_FRAPPE));
/// The built-in Catppuccin Macchiato variant of an [`Extended`] palette.
pub static EXTENDED_CATPPUCCIN_MACCHIATO: Lazy<Extended> =
Lazy::new(|| Extended::generate(Palette::CATPPUCCIN_MACCHIATO));
/// The built-in Catppuccin Mocha variant of an [`Extended`] palette.
pub static EXTENDED_CATPPUCCIN_MOCHA: Lazy<Extended> =
Lazy::new(|| Extended::generate(Palette::CATPPUCCIN_MOCHA));
/// The built-in Tokyo Night variant of an [`Extended`] palette.
pub static EXTENDED_TOKYO_NIGHT: Lazy<Extended> =
Lazy::new(|| Extended::generate(Palette::TOKYO_NIGHT));
/// The built-in Tokyo Night Storm variant of an [`Extended`] palette.
pub static EXTENDED_TOKYO_NIGHT_STORM: Lazy<Extended> =
Lazy::new(|| Extended::generate(Palette::TOKYO_NIGHT_STORM));
/// The built-in Tokyo Night variant of an [`Extended`] palette.
pub static EXTENDED_TOKYO_NIGHT_LIGHT: Lazy<Extended> =
Lazy::new(|| Extended::generate(Palette::TOKYO_NIGHT_LIGHT));
/// The built-in Kanagawa Wave variant of an [`Extended`] palette.
pub static EXTENDED_KANAGAWA_WAVE: Lazy<Extended> =
Lazy::new(|| Extended::generate(Palette::KANAGAWA_WAVE));
/// The built-in Kanagawa Dragon variant of an [`Extended`] palette.
pub static EXTENDED_KANAGAWA_DRAGON: Lazy<Extended> =
Lazy::new(|| Extended::generate(Palette::KANAGAWA_DRAGON));
/// The built-in Kanagawa Lotus variant of an [`Extended`] palette.
pub static EXTENDED_KANAGAWA_LOTUS: Lazy<Extended> =
Lazy::new(|| Extended::generate(Palette::KANAGAWA_LOTUS));
/// The built-in Moonfly variant of an [`Extended`] palette.
pub static EXTENDED_MOONFLY: Lazy<Extended> =
Lazy::new(|| Extended::generate(Palette::MOONFLY));
/// The built-in Nightfly variant of an [`Extended`] palette.
pub static EXTENDED_NIGHTFLY: Lazy<Extended> =
Lazy::new(|| Extended::generate(Palette::NIGHTFLY));
/// The built-in Oxocarbon variant of an [`Extended`] palette.
pub static EXTENDED_OXOCARBON: Lazy<Extended> =
Lazy::new(|| Extended::generate(Palette::OXOCARBON));
/// The built-in Ferra variant of an [`Extended`] palette.
pub static EXTENDED_FERRA: Lazy<Extended> =
Lazy::new(|| Extended::generate(Palette::FERRA));
impl Extended {
/// Generates an [`Extended`] palette from a simple [`Palette`].
pub fn generate(palette: Palette) -> Self {
Self {
background: Background::new(palette.background, palette.text),
primary: Primary::generate(
palette.primary,
palette.background,
palette.text,
),
secondary: Secondary::generate(palette.background, palette.text),
success: Success::generate(
palette.success,
palette.background,
palette.text,
),
danger: Danger::generate(
palette.danger,
palette.background,
palette.text,
),
is_dark: is_dark(palette.background),
}
}
}
/// Recommended background, icon, and text [`Color`].
#[derive(Debug, Clone, Copy, PartialEq)]
pub struct Pair {
/// The background color.
pub color: Color,
/// The icon color, which defaults to the text color.
pub icon: Color,
/// The text color.
///
/// It's guaranteed to be readable on top of the background [`color`].
///
/// [`color`]: Self::color
pub text: Color,
}
impl Pair {
/// Creates a new [`Pair`] from a background [`Color`] and some text [`Color`].
pub fn new(color: Color, text: Color) -> Self {
let text = readable(color, text);
Self {
color,
icon: text,
text,
}
}
}
/// A set of background colors.
#[derive(Debug, Clone, Copy, PartialEq)]
pub struct Background {
/// The base background color.
pub base: Pair,
/// A weaker version of the base background color.
pub weak: Pair,
/// A stronger version of the base background color.
pub strong: Pair,
}
impl Background {
/// Generates a set of [`Background`] colors from the base and text colors.
pub fn new(base: Color, text: Color) -> Self {
let weak = mix(base, text, 0.15);
let strong = mix(base, text, 0.40);
Self {
base: Pair::new(base, text),
weak: Pair::new(weak, text),
strong: Pair::new(strong, text),
}
}
}
/// A set of primary colors.
#[derive(Debug, Clone, Copy, PartialEq)]
pub struct Primary {
/// The base primary color.
pub base: Pair,
/// A weaker version of the base primary color.
pub weak: Pair,
/// A stronger version of the base primary color.
pub strong: Pair,
}
impl Primary {
/// Generates a set of [`Primary`] colors from the base, background, and text colors.
pub fn generate(base: Color, background: Color, text: Color) -> Self {
let weak = mix(base, background, 0.4);
let strong = deviate(base, 0.1);
Self {
base: Pair::new(base, text),
weak: Pair::new(weak, text),
strong: Pair::new(strong, text),
}
}
}
/// A set of secondary colors.
#[derive(Debug, Clone, Copy, PartialEq)]
pub struct Secondary {
/// The base secondary color.
pub base: Pair,
/// A weaker version of the base secondary color.
pub weak: Pair,
/// A stronger version of the base secondary color.
pub strong: Pair,
}
impl Secondary {
/// Generates a set of [`Secondary`] colors from the base and text colors.
pub fn generate(base: Color, text: Color) -> Self {
let base = mix(base, text, 0.2);
let weak = mix(base, text, 0.1);
let strong = mix(base, text, 0.3);
Self {
base: Pair::new(base, text),
weak: Pair::new(weak, text),
strong: Pair::new(strong, text),
}
}
}
/// A set of success colors.
#[derive(Debug, Clone, Copy, PartialEq)]
pub struct Success {
/// The base success color.
pub base: Pair,
/// A weaker version of the base success color.
pub weak: Pair,
/// A stronger version of the base success color.
pub strong: Pair,
}
impl Success {
/// Generates a set of [`Success`] colors from the base, background, and text colors.
pub fn generate(base: Color, background: Color, text: Color) -> Self {
let weak = mix(base, background, 0.4);
let strong = deviate(base, 0.1);
Self {
base: Pair::new(base, text),
weak: Pair::new(weak, text),
strong: Pair::new(strong, text),
}
}
}
/// A set of danger colors.
#[derive(Debug, Clone, Copy, PartialEq)]
pub struct Danger {
/// The base danger color.
pub base: Pair,
/// A weaker version of the base danger color.
pub weak: Pair,
/// A stronger version of the base danger color.
pub strong: Pair,
}
impl Danger {
/// Generates a set of [`Danger`] colors from the base, background, and text colors.
pub fn generate(base: Color, background: Color, text: Color) -> Self {
let weak = mix(base, background, 0.4);
let strong = deviate(base, 0.1);
Self {
base: Pair::new(base, text),
weak: Pair::new(weak, text),
strong: Pair::new(strong, text),
}
}
}
fn darken(color: Color, amount: f32) -> Color {
let mut hsl = to_hsl(color);
hsl.lightness = if hsl.lightness - amount < 0.0 {
0.0
} else {
hsl.lightness - amount
};
from_hsl(hsl)
}
fn lighten(color: Color, amount: f32) -> Color {
let mut hsl = to_hsl(color);
hsl.lightness = if hsl.lightness + amount > 1.0 {
1.0
} else {
hsl.lightness + amount
};
from_hsl(hsl)
}
fn deviate(color: Color, amount: f32) -> Color {
if is_dark(color) {
lighten(color, amount)
} else {
darken(color, amount)
}
}
fn mix(a: Color, b: Color, factor: f32) -> Color {
let a_lin = Rgb::from(a).into_linear();
let b_lin = Rgb::from(b).into_linear();
let mixed = a_lin.mix(b_lin, factor);
Rgb::from_linear(mixed).into()
}
fn readable(background: Color, text: Color) -> Color {
if is_readable(background, text) {
text
} else {
let white_contrast = relative_contrast(background, Color::WHITE);
let black_contrast = relative_contrast(background, Color::BLACK);
if white_contrast >= black_contrast {
Color::WHITE
} else {
Color::BLACK
}
}
}
fn is_dark(color: Color) -> bool {
to_hsl(color).lightness < 0.6
}
fn is_readable(a: Color, b: Color) -> bool {
let a_srgb = Rgb::from(a);
let b_srgb = Rgb::from(b);
a_srgb.has_enhanced_contrast_text(b_srgb)
}
fn relative_contrast(a: Color, b: Color) -> f32 {
let a_srgb = Rgb::from(a);
let b_srgb = Rgb::from(b);
a_srgb.relative_contrast(b_srgb)
}
fn to_hsl(color: Color) -> Hsl {
Hsl::from_color(Rgb::from(color))
}
fn from_hsl(hsl: Hsl) -> Color {
Rgb::from_color(hsl).into()
}