Inexpensive programmable RGB LED driver/IC/solution?
If I'm understanding your question right, you can accomplish this with a simple (and I mean simple!) circuit. Assuming your "dial device" operates like a switch, here is a circuit which assumes you just have a 2 state dial. Adding more LEDs is very simple; just add another LED to a different output of the dial switch. 


If this isn't what you were describing, give me a little more detail in a comment and I can help you resolve it.