Color therapy Yep, that's right, with color - it's called color therapy or chromotherapy. The Danish physiotherapist Niels Ryberg Finsen invented the scientific method of treatment with light of different lengths. As early as 1889 he discovered that UV light kills bacteria and disinfects the room. And in 1893 Finzen discovered that the color red heals wounds and created therapeutic "red rooms". Later he developed a special "Finsen lamp" and used concentrated violet and ultraviolet light to treat skin tuberculosis, a terrible and incurable disease at the time.