Alma’s laser can treat a wide variety of colors. The high powered 1064 nm: ND-YAG laser can successfully treat unwanted dark colored tattoos including Blue, Black and Green, while the 532 nm wavelength can successfully treat unwanted colored tattoos including red, orange and yellow. The laser works by breaking apart the ink deposited into the skin. Your immune system then works to rid the body of the particles in turn causing the tattoo to fade. ND-YAG can be used safely to treat all skin types.