Can also be silver or gold.
Use silver when there are strong colour nearby, eg green grassland which refect green tone onto ppl face.
Use gold when u want to create warm tone on face.
You want human with sick/ill looks use blue or green card, you want people looks like got jaundice use yellow card, you want them looks like drunk use red card.:bsmilie:
btw, You want your flash die faster use black card.:bsmilie::bsmilie::bsmilie:
hahahah.....good one...not sure why this tickled my funny bone but it does hahahahah....
But if you are using studio flash it should not die faster lah heheh....I personally would rather use something neutral and if I need, use photoshop to adjust the tones.