Colored golf balls are just fine, as long as you don't mind the rest of your foursome making fun of you for the entire round. And probably after you leave, and the next time you play, too.
Kind of reminds me of when I played with a friend (a new golfer) a few months ago. We were looking for an errant shot of his, I asked what he was hitting, and he said "topflite with 2 red stripes". He was playing range balls. Why pay $20 or more per dozen, when you can get a whole bucket for $6? Nobody has let him forget it since.