A little color variation and contrast looks good in my opinion.
Anodizing colors can be tricky. For example Giessle has a disclaimer for their colored parts, probably due to complaints about rails and mounts not matching every time.
I would like to know if certain Cerakote colors have a little bit of metallic in them? Not that they would be sparkly, but do they look a little like metal, or are they all completely flat? The photo above looks a bit metallic.