[3] In 1934 he established his own company and worked as an industrial color consultant, advising clients on the psychological effects of color on safety, employee morale, productivity and sales.
[1] He also wrote extensively on color, writing forty books and over 250 articles on the subject.
[2] Birren died in Stamford, Connecticut on 30 December 1988 after a stroke.
[1] Birren married Wanda Martin and they had two daughters, Zoe and Fay.
[1] In 1971, Birren donated nearly two hundred books about color, many of them rare, to the Yale University Library.