First you try (test) with one CLR. You may find that only one LED lights (lower forward voltage, red). Then you will need seperate CLR. Adjust for same brightness. No one can tell you what values, you have to try your LEDs and adjust.
Why is it impossible to mount a bi color but easy to mount two seperate LEDs? Can't visualize this. If its a different size and you want to use a bezel there are other sizes of bezel....