I started out with blue. They bred blue. But then they were turning black. I've been chalking it up to my ph being 7+.
Then some more breeding and I had some brown ones too. Someone told me a ratio of 50/50 is common.
Someone else told me males are brown.
I've not had any turn whitish, but some people have.
Honestly, I've heard such contradictory info out there, I'm not sure anyone has figured it out yet.
Interesting that water params can have such interesting effects on colors.