Is she going to stay black?

[SetskiesD]

Hey! My 2.5 week old ND is a solid black like her father (her mom is a broken black otter). Today I was looking at her and when I spread her fur apart it is gray underneath. Her dad is solid black. Is she going to stay solid black?

 

[Dood]

Black rabbits don't usually change colour with age - the exception are rabbits with the silver gene, such as D'Argents or Silver Fox

It could be that your rabbit is a self chinchilla or a "snowball" or is a black but with some unknown genetic factor lightening her under coat

 

[SableSteel]

Black rabbits often have a lighter gray undercoat

 

[akane]

Seals can look black and lighten to more of a dark chocolate but that is probably not happening here. I just had to state a color change example. Yours probably just has an undercoat fault where it is lighter than it should be.