.stmbu-button:nth-child(1) img{filter:invert(177% 137% 78%)}.stmbu-button:nth-child(2) img{filter:invert(177% 137% 78%)}.stmbu-button:nth-child(3) img{filter:invert(177% 137% 78%)}.stmbu-button:nth-child(4) img{filter:invert(177% 137% 78%)}.stmbu-button:nth-child(5) img{filter:invert(177% 137% 78%)}