"White" Darkling Beetle?

[MUD]

We recently started breeding our mealworms (by breeding I guess we have gone from worm to pupa to beetle - no baby worms yet). Tonight we found a pupa had hatched and the beetle was white. I can't find much other than a German video of one walking around.
Is this ok?
It looks otherwise healthy.

 

[Herpin Man]

They are white until the exoskeleton hardens. It will darken in a day or two.