Ok I see what the dual dual LED is.
Each bank of switch types has a different dual LED color.
Looks like the main keys are red and green (as red and green seem to make yellow).
The "Navigation" keys (arrows, insert, etc) SEEM TO be using blue/yellow or something. I know it's NOT blue red, because you can clearly see an orange or yellow color appear on those, when blue and red on the shine 4 go from magneta to purple. The effect goes from blue/purple to orangeish-yellow instead of red (like on the blue/red shine 4's). But blue and yellow make green too, but there is a difference between combining LIGHTS and PIGMENTS.
Number keypad is using red/green like the main keys.
F5-F8 are using blue/red. F1-F4 and F9-F12 seem to be using red/green.
The mod keys (control alt shift, etc) seem to be using red/blue.
The shine 4 was pretty. This is going to be a disco...
Oh well it will have to do until ducky comes out with their RGB...