Is 'pickup logo colors' trademarked?

[ken]

Hello all,

I see that Fender/Lace Sensor pickups have different colors for the logos on the front of their pickups, with gold for vintage type, blue for 'blues', and red for hot.

I can't find any patent/trademark info on this in any of my searches. Would anyone know what patent number this may be listed under?

Thank you and Happy New Year,
Ken

[David Schwab]

EMG does the same thing.

The logo would be trademarked in this case, but not the color.