[Suggestion] Different colors to distinguish between certain holidays

[Ypot]

Hi

I am happy with Calfw calendar, but I would like to see the "Solar Holidays" without confusing them with regular holidays.
By now I have set them as nil:
(setq holiday-solar-holidays nil)

Could it be possible to apply them a different color?, like:
'(cfw:face-holiday ((t :background "grey10" :foreground "#8c5353" :weight bold)))

But just for solar-holidays?

Thanks for your work