Dependent on the specs of the LEDs, Soundcard your using. Purple is usually a mix 2 DIEs 1x Red/1x blue, not sure how one makes pink red certainly but not sure what you'd mix, at any rate if using a NEC board you just need 1 OHM 2 WATT resistors on the RED and some amber DIEs, NEC boards don't need resistors for BLUE/GREEN/WHITE/ and PC AMBER. if using plecter such as a NBv3 or v4 i'd get the specs of the DIEs and the voltage of you battery and use this. http://led.linear1.org/1led.wiz to figure out what each resistor you need for each die.