Panik Kalm Panik

You realise your actually colour blind and that your dark blue

You still get voted out because everyone else is also colorblind.

Dammit

Is there a dark blue

It's just simply "Blue". The light blue you might be thinking about is called "Cyan".

I haven't played among us since October when it was really big

i think

once i was in a game and my cover got blown so before ejection i pretended to say another color (a random crewmate) is the other impostor and that crewmate got ejected the next meeting ;D i killed after i died

I've done this as imposter many times. Called out the other imposter when I'm pretty much done for. The only thing is, that imposter I called out, wasn't the imposter.
The trick is they vote him out because they think he is an imposter because I called him out in rage, but in reality, I'm pulling a sneaky on them.