What's in the dish? My red-eyes ignore things like mealworms, waxworms, and so on. If you are feeding him these or similar, stop. Use crickets, moths, maybe cockroaches. They do turn dark after lights out. I wouldn't handle him too much, red-eyes are not as tolerent of handling as White's are. Also you said you have only had him for three days, I wouldn't panic at this point. Let him settle in and let us know in a week what is happening.