Visualize.Color (Visualize v0.2.35)

Color manipulation utilities for parsing, converting, and manipulating colors.

Supports multiple color spaces: RGB, HSL, HCL (also known as LCH), and Lab. Provides color parsing, conversion, interpolation, and manipulation functions.

Examples

# Parsing various formats
color = Visualize.Color.parse("#ff6600")
color = Visualize.Color.parse("rgb(255, 102, 0)")
color = Visualize.Color.parse("hsl(24, 100%, 50%)")
color = Visualize.Color.parse("steelblue")

# Creating colors in different spaces
color = Visualize.Color.rgb(255, 102, 0)
color = Visualize.Color.hsl(24, 100, 50)

# Conversions
color |> Visualize.Color.to_hex()     # => "#ff6600"
color |> Visualize.Color.to_hsl()     # => %{h: 24, s: 100, l: 50, ...}

# Manipulation
color |> Visualize.Color.brighter(1.5)
color |> Visualize.Color.darker(0.5)
color |> Visualize.Color.with_opacity(0.5)

# Interpolation
Visualize.Color.interpolate_rgb(color1, color2, 0.5)

Summary

Types

t()

Functions

brighter(color, k \\ 1)

Returns a brighter copy of the color.

contrast(c1, c2)

Returns the contrast ratio between two colors (1-21)

darker(color, k \\ 1)

Returns a darker copy of the color.

desaturate(color, amount \\ 0.8)

Returns a desaturated copy (in HSL space)

grayscale(color)

Returns a grayscale version of the color

hcl(h, c, l, opacity \\ 1.0)

Creates a color from HCL values (h: 0-360, c: 0-~230, l: 0-100)

hsl(h, s, l, opacity \\ 1.0)

Creates a color from HSL values (h: 0-360, s: 0-100, l: 0-100)

interpolate_hcl(c1, c2, t)

Interpolates between two colors in HCL space (perceptually uniform)

interpolate_hsl(c1, c2, t)

Interpolates between two colors in HSL space

interpolate_lab(c1, c2, t)

Interpolates between two colors in Lab space

interpolate_rgb(c1, c2, t)

Interpolates between two colors in RGB space

invert(color)

Inverts the color

lab(l, a, b, opacity \\ 1.0)

Creates a color from Lab values (l: 0-100, a: -128 to 127, b: -128 to 127)

luminance(color)

Returns the relative luminance (0-1)

mix(c1, c2)

Mixes two colors equally (in RGB space)

named(name)

Gets a named color's hex value

named_colors()

Returns all named color names

parse(string)

Parses a color string into a Color struct.

rgb(r, g, b, opacity \\ 1.0)

Creates a color from RGB values (0-255)

rotate(color, degrees)

Rotates the hue by the specified degrees

saturate(color, amount \\ 1.2)

Returns a saturated copy (in HSL space)

to_hcl(color)

Converts to HCL map %{h: h, c: c, l: l, opacity: opacity}

to_hex(color)

Converts to hex string

to_hsl(color)

Converts to HSL map %{h: h, s: s, l: l, opacity: a}

to_lab(color)

Converts to Lab map %{l: l, a: a, b: b, opacity: opacity}

to_rgb(color)

Converts to RGB tuple {r, g, b}

to_rgba(color)

Converts to RGBA tuple {r, g, b, a}

to_string(color)

Converts to CSS string

with_opacity(color, opacity)

Returns a copy with the specified opacity

Types

t()

@type t() :: %Visualize.Color{
  b: number(),
  g: number(),
  opacity: number(),
  r: number()
}

Functions

brighter(color, k \\ 1)

@spec brighter(t(), number()) :: t()

Returns a brighter copy of the color.

k=1 is one "unit" brighter (default). k=2 is two units, etc.

contrast(c1, c2)

@spec contrast(t(), t()) :: float()

Returns the contrast ratio between two colors (1-21)

darker(color, k \\ 1)

@spec darker(t(), number()) :: t()

Returns a darker copy of the color.

k=1 is one "unit" darker (default). k=2 is two units, etc.

desaturate(color, amount \\ 0.8)

@spec desaturate(t(), number()) :: t()

Returns a desaturated copy (in HSL space)

grayscale(color)

@spec grayscale(t()) :: t()

Returns a grayscale version of the color

hcl(h, c, l, opacity \\ 1.0)

@spec hcl(number(), number(), number(), number()) :: t()

Creates a color from HCL values (h: 0-360, c: 0-~230, l: 0-100)

hsl(h, s, l, opacity \\ 1.0)

@spec hsl(number(), number(), number(), number()) :: t()

Creates a color from HSL values (h: 0-360, s: 0-100, l: 0-100)

interpolate_hcl(c1, c2, t)

@spec interpolate_hcl(t(), t(), number()) :: t()

Interpolates between two colors in HCL space (perceptually uniform)

interpolate_hsl(c1, c2, t)

@spec interpolate_hsl(t(), t(), number()) :: t()

Interpolates between two colors in HSL space

interpolate_lab(c1, c2, t)

@spec interpolate_lab(t(), t(), number()) :: t()

Interpolates between two colors in Lab space

interpolate_rgb(c1, c2, t)

@spec interpolate_rgb(t(), t(), number()) :: t()

Interpolates between two colors in RGB space

invert(color)

@spec invert(t()) :: t()

Inverts the color

lab(l, a, b, opacity \\ 1.0)

@spec lab(number(), number(), number(), number()) :: t()

Creates a color from Lab values (l: 0-100, a: -128 to 127, b: -128 to 127)

luminance(color)

@spec luminance(t()) :: float()

Returns the relative luminance (0-1)

mix(c1, c2)

@spec mix(t(), t()) :: t()

Mixes two colors equally (in RGB space)

named(name)

@spec named(String.t()) :: String.t() | nil

Gets a named color's hex value

named_colors()

@spec named_colors() :: [String.t()]

Returns all named color names

parse(string)

@spec parse(String.t()) :: t() | nil

Parses a color string into a Color struct.

Supports:

Hex: "#rgb", "#rrggbb", "#rgba", "#rrggbbaa"
RGB: "rgb(r, g, b)", "rgba(r, g, b, a)"
HSL: "hsl(h, s%, l%)", "hsla(h, s%, l%, a)"
Named colors: "steelblue", "red", etc.

rgb(r, g, b, opacity \\ 1.0)

@spec rgb(number(), number(), number(), number()) :: t()

Creates a color from RGB values (0-255)

rotate(color, degrees)

@spec rotate(t(), number()) :: t()

Rotates the hue by the specified degrees

saturate(color, amount \\ 1.2)

@spec saturate(t(), number()) :: t()

Returns a saturated copy (in HSL space)

to_hcl(color)

@spec to_hcl(t()) :: %{h: float(), c: float(), l: float(), opacity: float()}

Converts to HCL map %{h: h, c: c, l: l, opacity: opacity}

to_hex(color)

@spec to_hex(t()) :: String.t()

Converts to hex string

to_hsl(color)

@spec to_hsl(t()) :: %{h: float(), s: float(), l: float(), opacity: float()}

Converts to HSL map %{h: h, s: s, l: l, opacity: a}

to_lab(color)

@spec to_lab(t()) :: %{l: float(), a: float(), b: float(), opacity: float()}

Converts to Lab map %{l: l, a: a, b: b, opacity: opacity}

to_rgb(color)

@spec to_rgb(t()) :: {integer(), integer(), integer()}

Converts to RGB tuple {r, g, b}

to_rgba(color)

@spec to_rgba(t()) :: {integer(), integer(), integer(), float()}

Converts to RGBA tuple {r, g, b, a}

to_string(color)

@spec to_string(t()) :: String.t()

Converts to CSS string

with_opacity(color, opacity)

@spec with_opacity(t(), number()) :: t()

Returns a copy with the specified opacity