Sources

• Newton, Opticks (1704)
• Goethe, Zur Farbenlehre (1810)
• Purkyně (1819, Purkinje shift)
• Chevreul, The Law of Simultaneous Color Contrast (1839)
• McCandless, A Method of Lighting the Stage (1932)
• Itten, The Art of Color (1961)
• Albers, Interaction of Color (1963)
• CIE photopic luminosity function
• IES TM-30-18
• WCAG 2.1 (three-flash threshold)
• Epilepsy Foundation (photosensitivity)
• Elliot & Maier, Annual Review of Psychology (2014)
• LEE Filters / Rosco technical data
• Vari-Lite VL1 / Genesis Abacab tour (1981)

GEL cites its homework. If we got something wrong, tell us — the booth respects corrections.