Red - Green - Blue
Cyan, yellow, magenta, key (black)
Hue, saturation, value
Hue, saturation, lightness
The #669900 RGB color code (Heart Gold) is composed of a hexadecimal 66 red (102/256), a 99 green (153/256) and a 00 blue component (0/256). The decimal RGB color code is rgb(102,153,0).