Mitsubishi XD460U with Red/Green/Blue/White/Yellow color wheel.

I have painted the White(Clear) segment with silver enamel paint. Can I do the same with the Yellow segment or is it used when Brilliant Color is set to 0 or in Theater Mode?

The White segment was 2/3 the size of each of the Red/Green/Blue segments. The Yellow segment is 1/3 the size of each of the Red/Green/Blue segments.

If anyone knows please let me know the answer.