RGBA.parse

Parses a textual representation of a color, filling in the red, green, blue and alpha fields of the rgba #GdkRGBA.

The string can be either one of:

• A standard name (Taken from the X11 rgb.txt file).
• A hexadecimal value in the form “\#rgb”, “\#rrggbb”,

“\#rrrgggbbb” or ”\#rrrrggggbbbb”

• A RGB color in the form “rgb(r,g,b)” (In this case the color will

have full opacity)

• A RGBA color in the form “rgba(r,g,b,a)”

Where “r”, “g”, “b” and “a” are respectively the red, green, blue and alpha color values. In the last two cases, “r”, “g”, and “b” are either integers in the range 0 to 255 or percentage values in the range 0% to 100%, and a is a floating point value in the range 0 to 1.