The colours depicted are (in RGB tuples, captured using Zoom+):
(129,26,116) (254,140,255) (255,53,197)
(184,0,131) (214,78,207) (255,0,255)
(151,0,103) (255,174,244) (189,37,180)
Anything with a middle figure above zero requires green to display on a monitor. However, it gets interesting, because it depends in part on LED intensity — keyboard LEDs can be really bright and you might not need to add white to bring up the intensity (therefore no green required).