const class graphics::Color

sys::Obj
  graphics::Color : graphics::Paint

@Js
@Serializable { simple=true }

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Models an CSS4 RGB color with alpha

a

const Float a

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The alpha component from 0.0 to 1.0

asColorPaint

virtual override Color asColorPaint()

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Return this

b

Int b()

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The blue component from 0 to 255.

black

const static Color black := Color.make(0, 1.0)

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Black is #000

darker

Color darker(Float percentage := 0.2f)

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Get a color which is a dark shade of this color. This decreases the brightness by the given percentage which is a float between 0.0 and 1.0.

desaturate

Color desaturate(Float percentage := 0.2f)

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Convenience for saturate(-percentage).

equals

virtual override Bool equals(Obj? that)

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Equality

fromStr

static new fromStr(Str s, Bool checked := true)

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Parse color from CSS 4 string. If invalid and checked is true then throw ParseErr otherwise return null. The following formats are supported:

• CSS keyword color
• #RRGGBB
• #RRGGBBAA
• #RGB
• #RGBA
• rgb(r, g b)
• rgba(r, g, b, a)
• hsl(h, s, l)
• hsla(h, s, l, a)

Functional notation works with comma or space separated arguments.

Examples:

Color.fromStr("red")
Color.fromStr("#8A0")
Color.fromStr("#88AA00")
Color.fromStr("rgba(255, 0, 0, 0.3)")
Color.fromStr("rgb(100% 0% 0% 25%)")

g

Int g()

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The green component from 0 to 255.

h

Float h()

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Hue as a float between 0.0 and 360.0 of the HSL model (hue, saturation, lightness). Also see makeHsl, s, l.

hash

virtual override Int hash()

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Return the hash code.

interpolateHsl

static Color interpolateHsl(Color a, Color b, Float t)

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Interpolate between a and b where t is 0.0 to 1.0 using HSL color model.

interpolateRgb

static Color interpolateRgb(Color a, Color b, Float t)

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Interpolate between a and b where t is 0.0 to 1.0 using RGB color model.

isColorPaint

virtual override Bool isColorPaint()

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Always return true

isTransparent

Bool isTransparent()

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Return if a is zero, fully transparent

l

Float l()

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Lightness (brightness) as a float between 0.0 and 1.0 of the HSL model (hue, saturation, lightness). Also see makeHsl, h, s.

lighter

Color lighter(Float percentage := 0.2f)

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Get a color which is a lighter shade of this color. This increases the brightness by the given percentage which is a float between 0.0 and 1.0.

make

new make(Int rgb := 0, Float a := 1.0f)

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Make a new instance with the RGB components masked together: bits 16-23 red; bits 8-15 green; bits 0-7 blue. Alpha should be a float between 1.0 and 0.0.

makeHsl

static Color makeHsl(Float h, Float s, Float l, Float a := 1.0f)

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Construct a color using HSL model (hue, saturation, lightness):

• hue as 0.0 to 360.0
• saturation as 0.0 to 1.0
• lightness (or brightness) as 0.0 to 1.0
• alpha as 0.0 to 1.0 Also see h, s, l.

makeRgb

static Color makeRgb(Int r, Int g, Int b, Float a := 1.0f)

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Make a new instance with the RGB individual components as integers between 0 and 255 and alpha as float between 1.0 and 0.0.

opacity

Color opacity(Float opacity := 1.0f)

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Adjust the opacity of this color and return new instance, where opacity is between 0.0 and 1.0.

r

Int r()

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The red component from 0 to 255.

rgb

const Int rgb

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The RGB components masked together: bits 16-23 red; bits 8-15 green; bits 0-7 blue.

s

Float s()

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Saturation as a float between 0.0 and 1.0 of the HSL model (hue, saturation, lightness). Also see makeHsl, h, l.

saturate

Color saturate(Float percentage := 0.2f)

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Adjust saturation as percentage between -1..1.

toHexStr

Str toHexStr()

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Format as #RGB, #RRGGBB or #RRGGBBAA syntax

toStr

virtual override Str toStr()

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If the alpha component is 1.0, then format as "#RRGGBB" hex string, otherwise format as "rbga()" notation.

transparent

const static Color transparent := Color.make(0, 0.0)

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Transparent constant with opacity set to zero

white

const static Color white := Color.make(16777215, 1.0)

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White is #FFF