@article {26431, title = {Demonstration of the Spectrophotometric Complementary Color Wheel Using LEDs and Indicator Dyes}, journal = {Journal of Chemical Education}, volume = {92}, year = {2015}, pages = {DOI: 10.1021/acs.jchemed.5b00665}, author = {W.R. Algar and C.A.G. De Jong and E.J. Maxwell and C.G. Atkins} }