It's grey (so lighter than the background, though sometimes the background is white) and has a white symbol on it, so visibility isn't a problem.
I'm tempted to say "so what?". There's no common standard, manufacturers change these things occasionally, and it seems a very trivial thing to get freaked out about. There's also nothing you can do about it, so best to just get used to it.
I can tell you that it's the same on my s21, so it is normal for Samsung running android 12.