A note to the schematic:
The "wires" from the schematic is there to illustrate where the circuit will be hooked up to the RGB LED on the PCB, the R LED that looks like it is in parallel with it is actual the Red part of the RGB LED.
I have made a spice simulation of my circuit by using LTSpice. This is as a proof of concept before doing the actual hack. It is very nice to be able to test your circuit before buying all the components, in case you got a brain fart, it might save you some time and money ;-)
The optocoupler and voltage source, down in the right corner of the LTSpice window, simulates the push button that will wake up the background LED.