Look around before you make a purchase. If there are ones you really like, ask to handle it. Check for any signs that seem abnormal such as the snake not being alert, tongue not flicking but sticking out, underweight, popping/clicking noises when it exhales, things such as that. For the coloration whether it's bright or dark would be your choice because you may like the low contrast Binos but I may suggest High contrast. So it's up to you on what you want for the coloration, and that will also vary in price.