That actually would not work as well, metallic colours like gold and white (silver) don't look good against each other, and trying it out it simply didn't keep with the scheme.I think the colours are fine, just not the most "optimal" aesthetic but still pretty alright
Generally yellow looks better within black than the other way around
Same for red within blue
But I do think they're pretty good as is
I also wanted to have natural Slavic leadership colours so it must be those colours.