Struct pastel::Color

pub struct Color { /* private fields */ }

The representation of a color.

Note:

• Colors outside the sRGB gamut (which cannot be displayed on a typical computer screen) can not be represented by Color.
• The PartialEq instance compares two Colors by comparing their (integer) RGB values. This is different from comparing the HSL values. For example, HSL has many different representations of black (arbitrary hue and saturation values).

Implementations

impl Color

pub fn from_hsla(hue: f64, saturation: f64, lightness: f64, alpha: f64) -> Color

pub fn from_hsl(hue: f64, saturation: f64, lightness: f64) -> Color

pub fn from_rgba(r: u8, g: u8, b: u8, alpha: f64) -> Color

Create a Color from integer RGB values between 0 and 255 and a floating point alpha value between 0.0 and 1.0.

pub fn from_rgb(r: u8, g: u8, b: u8) -> Color

Create a Color from integer RGB values between 0 and 255.

pub fn from_rgba_float(r: f64, g: f64, b: f64, alpha: f64) -> Color

Create a Color from RGB and alpha values between 0.0 and 1.0. Values outside this range will be clamped.

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

Create a Color from RGB values between 0.0 and 1.0. Values outside this range will be clamped.

pub fn from_xyz(x: f64, y: f64, z: f64, alpha: f64) -> Color

Create a Color from XYZ coordinates in the CIE 1931 color space. Note that a Color always represents a color in the sRGB gamut (colors that can be represented on a typical computer screen) while the XYZ color space is bigger. This function will tend to create fully saturated colors at the edge of the sRGB gamut if the coordinates lie outside the sRGB range.

See:

• https://en.wikipedia.org/wiki/CIE_1931_color_space
• https://en.wikipedia.org/wiki/SRGB

pub fn from_lms(l: f64, m: f64, s: f64, alpha: f64) -> Color

Create a Color from LMS coordinates. This is the matrix inverse of the matrix that appears in to_lms.

pub fn from_lab(l: f64, a: f64, b: f64, alpha: f64) -> Color

Create a Color from L, a and b coordinates coordinates in the Lab color space. Note: See documentation for from_xyz. The same restrictions apply here.

See: https://en.wikipedia.org/wiki/Lab_color_space

pub fn from_lch(l: f64, c: f64, h: f64, alpha: f64) -> Color

Create a Color from lightness, chroma and hue coordinates in the CIE LCh color space. This is a cylindrical transform of the Lab color space. Note: See documentation for from_xyz. The same restrictions apply here.

See: https://en.wikipedia.org/wiki/Lab_color_space

pub fn from_cmyk(c: f64, m: f64, y: f64, k: f64) -> Color

Create a Color from the four colours of the CMYK model: Cyan, Magenta, Yellow and Black. The CMYK colours are subtractive. This means the colours get darker as you blend them together

pub fn to_hsla(&self) -> HSLA

Convert a Color to its hue, saturation, lightness and alpha values. The hue is given in degrees, as a number between 0.0 and 360.0. Saturation, lightness and alpha are numbers between 0.0 and 1.0.

pub fn to_hsl_string(&self, format: Format) -> String

Format the color as a HSL-representation string (hsla(123, 50.3%, 80.1%, 0.4)). If the alpha channel is 1.0, the simplified hsl() format will be used instead.

pub fn to_rgba(&self) -> RGBA<u8>

Convert a Color to its red, green, blue and alpha values. The RGB values are integers in the range from 0 to 255. The alpha channel is a number between 0.0 and 1.0.

pub fn to_rgb_string(&self, format: Format) -> String

Format the color as a RGB-representation string (rgba(255, 127, 0, 0.5)). If the alpha channel is 1.0, the simplified rgb() format will be used instead.

pub fn to_cmyk(&self) -> CMYK

Convert a Color to its cyan, magenta, yellow, and black values. The CMYK values are floats smaller than or equal to 1.0.

pub fn to_cmyk_string(&self, format: Format) -> String

Format the color as a CMYK-representation string (cmyk(0, 50, 100, 100)).

pub fn to_rgb_float_string(&self, format: Format) -> String

Format the color as a floating point RGB-representation string (rgb(1.0, 0.5, 0)). If the alpha channel is 1.0, the simplified rgb() format will be used instead.

pub fn to_rgb_hex_string(&self, leading_hash: bool) -> String

Format the color as a RGB-representation string (#fc0070). The output will contain 6 hex digits if the alpha channel is 1.0, or 8 hex digits otherwise.

pub fn to_rgba_float(&self) -> RGBA<f64>

Convert a Color to its red, green, blue and alpha values. All numbers are from the range between 0.0 and 1.0.

pub fn to_u32(&self) -> u32

Return the color as an integer in RGB representation (0xRRGGBB)

pub fn to_xyz(&self) -> XYZ

Get XYZ coordinates according to the CIE 1931 color space.

See:

• https://en.wikipedia.org/wiki/CIE_1931_color_space
• https://en.wikipedia.org/wiki/SRGB

pub fn to_lms(&self) -> LMS

Get coordinates according to the LSM color space

See https://en.wikipedia.org/wiki/LMS_color_space for info on the color space as well as an algorithm for converting from CIE XYZ

pub fn to_lab(&self) -> Lab

Get L, a and b coordinates according to the Lab color space.

See: https://en.wikipedia.org/wiki/Lab_color_space

pub fn to_lab_string(&self, format: Format) -> String

Format the color as a Lab-representation string (Lab(41, 83, -93, 0.5)). If the alpha channel is 1.0, it won’t be included in the output.

pub fn to_lch(&self) -> LCh

Get L, C and h coordinates according to the CIE LCh color space.

See: https://en.wikipedia.org/wiki/Lab_color_space

pub fn to_lch_string(&self, format: Format) -> String

Format the color as a LCh-representation string (LCh(0.3, 0.2, 0.1, 0.5)). If the alpha channel is 1.0, it won’t be included in the output.

pub fn black() -> Color

Pure black.

pub fn white() -> Color

Pure white.

pub fn red() -> Color

Red (#ff0000)

pub fn green() -> Color

Green (#008000)

pub fn blue() -> Color

Blue (#0000ff)

pub fn yellow() -> Color

Yellow (#ffff00)

pub fn fuchsia() -> Color

Fuchsia (#ff00ff)

pub fn aqua() -> Color

Aqua (#00ffff)

pub fn lime() -> Color

Lime (#00ff00)

pub fn maroon() -> Color

Maroon (#800000)

pub fn olive() -> Color

Olive (#808000)

pub fn navy() -> Color

Navy (#000080)

pub fn purple() -> Color

Purple (#800080)

pub fn teal() -> Color

Teal (#008080)

pub fn silver() -> Color

Silver (#c0c0c0)

pub fn gray() -> Color

Gray (#808080)

pub fn graytone(lightness: f64) -> Color

Create a gray tone from a lightness value (0.0 is black, 1.0 is white).

pub fn rotate_hue(&self, delta: f64) -> Color

Rotate along the “hue” axis.

pub fn complementary(&self) -> Color

Get the complementary color (hue rotated by 180°).

pub fn lighten(&self, f: f64) -> Color

Lighten a color by adding a certain amount (number between -1.0 and 1.0) to the lightness channel. If the number is negative, the color is darkened.

pub fn darken(&self, f: f64) -> Color

Darken a color by subtracting a certain amount (number between -1.0 and 1.0) from the lightness channel. If the number is negative, the color is lightened.

pub fn saturate(&self, f: f64) -> Color

Increase the saturation of a color by adding a certain amount (number between -1.0 and 1.0) to the saturation channel. If the number is negative, the color is desaturated.

pub fn desaturate(&self, f: f64) -> Color

Decrease the saturation of a color by subtracting a certain amount (number between -1.0 and 1.0) from the saturation channel. If the number is negative, the color is saturated.

pub fn simulate_colorblindness(&self, cb_ty: ColorblindnessType) -> Color

Adjust the long-, medium-, and short-wavelength cone perception of a color to simulate what a colorblind person sees. Since there are multiple kinds of colorblindness, the desired kind must be specified in cb_ty.

pub fn to_gray(&self) -> Color

Convert a color to a gray tone with the same perceived luminance (see luminance).

pub fn brightness(&self) -> f64

The percieved brightness of the color (A number between 0.0 and 1.0).

See: https://www.w3.org/TR/AERT#color-contrast

pub fn is_light(&self) -> bool

Determine whether a color is perceived as a light color (perceived brightness is larger than 0.5).

pub fn luminance(&self) -> f64

The relative brightness of a color (normalized to 0.0 for darkest black and 1.0 for lightest white), according to the WCAG definition.

See: https://www.w3.org/TR/2008/REC-WCAG20-20081211/#relativeluminancedef

pub fn contrast_ratio(&self, other: &Color) -> f64

Contrast ratio between two colors as defined by the WCAG. The ratio can range from 1.0 to 21.0. Two colors with a contrast ratio of 4.5 or higher can be used as text color and background color and should be well readable.

https://www.w3.org/TR/2008/REC-WCAG20-20081211/#contrast-ratiodef

pub fn text_color(&self) -> Color

Return a readable foreground text color (either black or white) for a given background color.

pub fn distance_delta_e_cie76(&self, other: &Color) -> f64

Compute the perceived ‘distance’ between two colors according to the CIE76 delta-E standard. A distance below ~2.3 is not noticable.

See: https://en.wikipedia.org/wiki/Color_difference

pub fn distance_delta_e_ciede2000(&self, other: &Color) -> f64

Compute the perceived ‘distance’ between two colors according to the CIEDE2000 delta-E standard.

See: https://en.wikipedia.org/wiki/Color_difference

pub fn mix<C: ColorSpace>(
    self: &Color,
    other: &Color,
    fraction: Fraction
) -> Color

Mix two colors by linearly interpolating between them in the specified color space. For the angle-like components (hue), the shortest path along the unit circle is chosen.

pub fn composite(&self, source: &Color) -> Color

Alpha composite two colors, placing the second over the first.

Trait Implementations

impl AnsiColor for Color

fn from_ansi_8bit(code: u8) -> Color

Create a color from an 8-bit ANSI escape code

See: https://en.wikipedia.org/wiki/ANSI_escape_code

fn to_ansi_8bit(&self) -> u8

Approximate a color by its closest 8-bit ANSI color (as measured by the perceived color distance).

See: https://en.wikipedia.org/wiki/ANSI_escape_code

fn to_ansi_sequence(&self, mode: Mode) -> String

Return an ANSI escape sequence in 8-bit or 24-bit representation:

• 8-bit: ESC[38;5;CODEm, where CODE represents the color.
• 24-bit: ESC[38;2;R;G;Bm, where R, G, B represent 8-bit RGB values

impl Clone for Color

fn clone(&self) -> Color

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Color

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

Formats the value using the given formatter.

impl Display for Color

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

Formats the value using the given formatter.

impl From<&'_ CMYK> for Color

fn from(color: &CMYK) -> Self

Converts to this type from the input type.

impl From<&'_ Color> for Style

fn from(color: &Color) -> Style

Converts to this type from the input type.

impl From<&'_ Color> for RGBA<f64>

fn from(color: &Color) -> Self

Converts to this type from the input type.

impl From<&'_ Color> for RGBA<u8>

fn from(color: &Color) -> Self

Converts to this type from the input type.

impl From<&'_ Color> for HSLA

fn from(color: &Color) -> Self

Converts to this type from the input type.

impl From<&'_ Color> for XYZ

fn from(color: &Color) -> Self

Converts to this type from the input type.

impl From<&'_ Color> for LMS

fn from(color: &Color) -> Self

Converts to this type from the input type.

impl From<&'_ Color> for Lab

fn from(color: &Color) -> Self

Converts to this type from the input type.

impl From<&'_ Color> for LCh

fn from(color: &Color) -> Self

Converts to this type from the input type.

impl From<&'_ Color> for CMYK

fn from(color: &Color) -> Self

Converts to this type from the input type.

impl From<&'_ HSLA> for Color

fn from(color: &HSLA) -> Self

Converts to this type from the input type.

impl From<&'_ LCh> for Color

fn from(color: &LCh) -> Self

Converts to this type from the input type.

impl From<&'_ LMS> for Color

fn from(color: &LMS) -> Self

Converts to this type from the input type.

impl From<&'_ Lab> for Color

fn from(color: &Lab) -> Self

Converts to this type from the input type.

impl From<&'_ RGBA<f64>> for Color

fn from(color: &RGBA<f64>) -> Self

Converts to this type from the input type.

impl From<&'_ RGBA<u8>> for Color

fn from(color: &RGBA<u8>) -> Self

Converts to this type from the input type.

impl From<&'_ XYZ> for Color

fn from(color: &XYZ) -> Self

Converts to this type from the input type.

impl From<Color> for Style

fn from(color: Color) -> Style

Converts to this type from the input type.

impl FromStr for Color

type Err = &'static str

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl PartialEq<Color> for Color

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl ToAnsiStyle for Color

fn ansi_style(&self) -> Style