Color class
An immutable 32-bit color value in ARGB format.
This class is intended to be semantically similar to dart:ui's Color,
but includes additional functionality, and is platform independent (i.e.
is suitable for non-Flutter environments, such as CLIs or non-Flutter web
applications).
NOTE: Unlike dart:ui, custom implementations are not supported.
Prefer composition over inheritance.
- Annotations
-
- @immutable
- @sealed
Constructors
- Color(int value)
-
Constructs a color from the lower 32-bits of an int.
const
- Color.fromARGB(int a, int r, int g, int b)
-
Construct a color from the lower 8-bits of 4 integers.
const
- Color.fromHSB(double h, double s, double v, {double opacity = 1.0})
-
Constructs a color from _Hue-Saturation-Brightness, an RGB
alternative.
factory
- Color.fromHSL(double h, double s, double l, {double opacity = 1.0})
-
Constructs a color from Hue-Saturation-Lightness, an RGB
alternative.
factory
- Color.fromRGB(int r, int g, int b)
-
Constructs a fully opaque color from the lower 8-bits of 3 integers.
const
- Color.fromRGBO(int r, int g, int b, double o)
-
Construct a color from the lower 8-bits of 3 integers and a double.
const
Properties
- alpha → int
-
The alpha channel of this color as an 8-bit value.
no setter
- blue → int
-
The blue channel of this color as an 8-bit value.
no setter
- green → int
-
The green channel of this color as an 8-bit value.
no setter
- hashCode → int
-
The hash code for this object.
no setteroverride
- isOpaque → bool
-
Whether the color is fully opaque, i.e.
alpha == 0xFF.no setter - isTransparent → bool
-
Whether the color is not fully opaque, i.e.
alpha < 0xFF.no setter - isVisible → bool
-
Whether the color is not fully transparent, i.e.
alpha > 0x00.no setter - opacity → double
-
The alpha channel of this color as a double.
no setter
- red → int
-
The red channel of this color as an 8-bit value.
no setter
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- value → int
-
A 32-bit value representing this color.
final
Methods
-
computeHSB(
) → HSBResult - Computes and returns as hue, saturation, and brightness.
-
computeHSL(
) → HSLResult - Computes and returns as hue, saturation, and lightness.
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toString(
) → String -
A string representation of this object.
override
-
withARGB(
{int? alpha, int? red, int? green, int? blue}) → Color - Returns a copy of color element, with non-null values replaced.
-
withRGBO(
{int? red, int? green, int? blue, double? opacity}) → Color - Returns a copy of color element, with non-null values replaced.
Operators
-
operator ==(
Object other) → bool -
The equality operator.
override