I always carry some green/watermelon ones (I've used various color flecks,..black, green, red, purple, but my current favorite is large gold flecks in them) ,..
The other color that's produced the best for me over the years has been black/blue flecks. If they are biting stick worms at all,..it's going to be a rare day that you won't catch them on one of those two colors!!