Scientific colour map demonstration
A photograph of Marie Skłodowska-Curie, the Earth from space, and an apple demonstrate the superiority of scientific colour maps.
Light spectrum (approximation)
Approximate RGB values for the visible wavelengths of the light spectrum.
Endrainbow
An icon to indicate the misuse of unscientific colour gradients that visually distort the underlying data and are not accessible to colour-vision deficient viewers.