Black skin

quirra

I've seen assassins and other classes with dark black skin but I can't get it on the color wheel--is there some sort of trick to it?

SilversMoon - Heavens Tear

If it's not possible to do it the normal way. Don't try otherwise.
Alot can be changed to give classes attributes they don't rightfully posses such as;
Different hair styles from other races, extreme body proportions and I guess skin color can be too.
But all of those involve editing the game data files. And is in fact bannable.

Daggster - Lost City

u can have a black looking skin without editing the gamefiles by setting the skincolor to a very dark blue while creating the char.