darken: Make a color (given as name or in RGB) darker by factor x = [0 = black, 1=unchanged]
Description
Make a color (given as name or in RGB) darker by factor x = [0 = black, 1=unchanged]
Usage
darken(color, factor = 0.8)
Arguments
color
A color as understood by col2rgb
factor
Between 0 (make black) and 1 (leave color as is)