“…Although reactions to red, 7-16 purple, [17][18] green, 19 blue, [20][21][22][23][24] brown, 25 and black 16,[26][27][28] have been reported, mercuric sulfide (red pigment) is the most common irritant in tattoo hypersensitivity. 2,[7][8][9][10] Modern red pigment alternatives such as cadmium selenide (cadmium red), ferric hydrate (sienna/red ochre), and organic vegetable dyes such as brazilwood and sandalwood are still causing red dye hypersensitivities.…”