Conure Beak Color

Are some conures (Crimson Bellied) born with a light beak and does it then darken as they get older? Or if they are born with a lighter beak, then will it remain that way when they are mature? Most pictures I see of baby Crimsons show them with a dark beak but I was looking at purchasing a baby which appears to have a lighter beak and was wondering if it will stay that way.
Thank you.