ok I'll take a stab at this one.pastel is one of the morphs of ballpythons.They show alot of bright yellow and orange as babies witch fades with age,also they have alot less black than a normal

the pastel gene is codom,witch means when you breed a pastel to a normal you get half pastel and half normal.when pastel is breed to pastel you get super pastel witch when bred to a normal you get all pastels
here is a pic of a pastel

here is a normal