Hallucinatory perception of colored lights.

Roget 428: color, hue, tint, tinge, dye, complexion, shade, tincture, cast, livery, coloration, glow, flush; tone, key.    pure color, positive color, primary color, primitive complementary color; three primaries; spectrum, chromatic dispersion; broken color, secondary color, tertiary color.    local color, coloring, keeping, tone, value, aerial perspective.    [Science of color] chromatics, spectrum analysis, spectroscopy; chromatism^†, chromatography^†, chromatology^†.    [instruments to measure color] prism, spectroscope, spectrograph, spectrometer, colorimeter (optical instruments) 445.    pigment, coloring matter, paint, dye, wash, distemper, stain; medium; mordant; oil paint etc. (painting) 556.    ... show more

Abnormal pigmentation.