formatRgb method
Returns a string representing this color according to the CSS Object Model
specification, such as rgb(247, 234, 186)
or rgba(247, 234, 186, 0.2)
.
If this color is not displayable, a suitable displayable color is returned instead by clamping RGB channel values to the interval [0, 255].
Implementation
String formatRgb() => rgb().formatRgb();