returns the RGB values of a named color
rgb=name2rgb(name)
:name name of the color. : :rgb vector of RGB integer values of a color. :
name2rgb returns the RGB values of a color given by its name. The result is a vector [r,g,b] where r, g and b are integers between 0 and 255 corresponding to colors components red, green and blue. As usual 0 means no intensity and 255 means all the intensity of the color.
If no color is found [] is returned.
The list of all known colors is given by color_list.
rgb=name2rgb("gold")
`rgb2name`_(rgb)