Examples
#RRGGBB #ff0044
#RGB    #f04
rgb(r,g,b) [r g b] = 0..255 or 0% .. 100%  rgb(255,0,64) , rgb(100%,0%,25%)
ColorNames red blue ...
SystemColor Highlight ActiveBorder Scrollbar ...

!! color picker supports #rrggbb only other values will show black preview !!