If there was a Japanese comic where every hero was Japanese, and then the one white hero who is introduced for diversity sake is named White Tiger, then that's the same thing as Black Panther; it doesn't end up showing equality; rather it highlights the fact that they're different/not equal.
A black person can wear black, and be named "black ____", it's just in the context of being marvel's first black superhero that a black hero named Black Panther who wears all black seems a little on the nose.
You should read Manga more. If there is a foreigner in a Japanese setting he/she will almost always be white. That and most manga characters don't have super hero names, they just go as themselves and kick-ass.