CFA-631 (white on blue): 10% B, 30% C
CFA-632 (yellow on black): 20% B, 60% C
CFA-633#1 (black on yellow): 50% B, 25% C
CFA-633#1 (black on yellow): 40% B, 40% C
CFA-634 (white on blue): 100% B, 80% C
CFA-635 (white on blue): 50% B, 50% C
I set these up so that I can get a reasonable picture for the User Screen Forum. Also, my 634 is quite old. A newer one might require a completely different set of values.