Struct Color 

pub struct Color {
    pub r: f64,
    pub g: f64,
    pub b: f64,
    pub a: f64,
}

sRGB color, 0.0–1.0 components. Semantic theme tokens (§6.3) resolve to these in the backend.

Fields

r: f64

g: f64

b: f64

a: f64

Implementations

impl Color

pub const BLACK: Color

pub const WHITE: Color

pub const CLEAR: Color

pub const fn rgba(r: f64, g: f64, b: f64, a: f64) -> Color

pub const fn rgb(r: f64, g: f64, b: f64) -> Color

pub const fn hex(v: u32) -> Color

0xRRGGBB

pub fn hsl(h: f64, s: f64, l: f64) -> Color

From HSL: h in degrees (wraps mod 360), s/l in 0.0..=1.0. Color is the one color type every parameter accepts, so this makes HSL usable everywhere a color is.

pub fn hsla(h: f64, s: f64, l: f64, a: f64) -> Color

pub fn hsv(h: f64, s: f64, v: f64) -> Color

From HSV/HSB: h degrees (wraps), s/v in 0.0..=1.0.

pub fn hsva(h: f64, s: f64, v: f64, a: f64) -> Color

pub fn to_hsl(&self) -> (f64, f64, f64)

Decompose to (hue°, saturation, lightness) (HSL). Hue is 0.0 for grays.

pub fn to_hsv(&self) -> (f64, f64, f64)

Decompose to (hue°, saturation, value) (HSV/HSB), the model every native color picker’s spectrum tab is built on, so this is what a renderer seeds its sliders from. Hue is 0.0 for grays. Inverse of Color::hsv.

pub fn with_alpha(self, a: f64) -> Color

The same color at a different opacity: what a picker’s alpha slider produces, and what tinting a surface down to a wash needs (palette.with_alpha(0.14)).

pub fn to_hex_string(&self) -> String

#rrggbb, or #rrggbbaa when the color is not fully opaque. The 8-bit form every platform’s own color field speaks, and what Color::parse round-trips.

pub fn parse(s: &str) -> Option<Color>

Parse a color from either interchange form:

• hex: #rgb, #rgba, #rrggbb, #rrggbbaa (the leading # optional). What a person types, and what an 8-bit platform field (<input type="color">, Windows.UI.Color, android.graphics.Color) hands back.
• components: 3 or 4 space-separated floats in 0.0..=1.0, "r g b" / "r g b a". The lossless form, for the toolkits whose picker really is float-precision (NSColor, GdkRGBA, QColor::getRgbF).

None on anything else. See docs/color.md for why the currency stays sRGB for now and what a wider one would carry.

pub fn lerp_hsl(self, to: Color, t: f64) -> Color

Interpolate toward to in HSL space, taking the shortest hue arc (t in 0.0..=1.0). A hue-space blend (red→green sweeps through yellow) rather than the muddy RGB straight line, used by the canvas / self-driven animation path (native widget color animation interpolates in the toolkit’s own space).

Trait Implementations

impl Animatable for Color

fn lerp(self, to: Color, t: f64) -> Color

impl Clone for Color

fn clone(&self) -> Color

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Color

impl Debug for Color

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Display for Color

The lossless interchange form: four space-separated components, exactly what Color::parse reads back. This is what crosses a JNI / C-ABI / JS boundary when a native color picker reports a pick, so the float precision NSColor and GdkRGBA really carry is not rounded to 8 bits on the way. For the form a person reads (and types into a dayscript step) use Color::to_hex_string.

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl From<Color> for Paint

fn from(c: Color) -> Paint

Converts to this type from the input type.

impl Lerp for Color

Colors blend in OKLab (Björn Ottosson’s perceptual space), alpha linearly: the midpoint of blue and yellow is a clean mid-lightness color rather than sRGB’s dim gray, and a sequential scale’s in-between cells read as in-between values. The endpoints are exact.

fn lerp(&self, to: &Color, t: f64) -> Color

impl PartialEq for Color

fn eq(&self, other: &Color) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Color