Hey, Kohaku here.
So I don't think this is a bad idea! Rather, it shows your dedication towards creating more inspiring work. Anatomy and colour are both very complex systems, while it is possible to split time on both pursuits, focusing on one is perfectly fine. There are many who do just fine on only greyscale pallets so don't sweat too much about colour.
Personally, I prefer a well proportioned image before colour. So go ahead and focus on that if you so choose. It is true that a good base design can overpower the choice of colour.
On the other hand, colour is such a complex system in itself, there is a lot of psychology behind colour choice. A simple pallet can work wonders to anything. But it isn't necessary.
Do whatever you want bro! Art has no rules so just do what feels right to you!
It'll be awesome either way~ (did that help?)
