.stmbu-button:nth-child(1) img{filter:invert(255% 255% 255%)}.stmbu-button:nth-child(2) img{filter:invert(255% 255% 255%)}.stmbu-button:nth-child(3) img{filter:invert(255% 255% 255%)}.stmbu-button:nth-child(4) img{filter:invert(21% 117% 96%)}.stmbu-button:nth-child(5) img{filter:invert(0% 0% 0%)}.stmbu-button:nth-child(6) img{filter:invert(0% 0% 0%)}.stmbu-button:nth-child(7) img{filter:invert(0% 0% 0%)}