lovebirds have not developed full color

by dawn

A year and a half ago, two lovebirds that were given to me laid eggs. After the first couple weeks, the babies were hand raised. They seem healthy. Very active and rambunctious, eat well, and seem to preen normally. My only experience with birds are these, but I don't believe there is anything wrong with them that I can detect. There are no bird vets in my area.

While the babies are now the same size as the adults, they have never developed the richness in color that the adults have. Their greens and turquoise are more muted. Their neck has remained a sort of off white, never developing the bright peach or orange of the parents, and across their forehead they are more of a light peach rather than the red of the parents. Their diet consist of a mixture of seed and pellets, with some fresh vegetables thrown in. Any info you can give will be appreciated.