Thanks for the info, Ady. Unfortunately, Final Cut Pro 5.1 has no such hue/saturation control to manipulate each one separately. I can only affect the overall color with the filters I have. Sucks.
CORRECTION: After doing a search for "Final Cut Pro hue filter," I ultimately came to a tutorial showing how to do this sort of thing with the Color Corrector and Limit Effect controls. Results, so far, are not as solid, but most of the cyan hue is drained down.
-NJM