Blue | Description, Etymology, & Facts | Britannica
https://www.britannica.com/science/blue-color
WebNov 14, 2023 · Blue, in physics, light in the wavelength range of 450–495 nanometers in the visible spectrum. In art, blue is a color on the conventional wheel, located between green and violet and opposite orange, its complement. Pigments for blue have come from a variety of sources, including azurite, ultramarine, and indigo.
DA: 59 PA: 24 MOZ Rank: 35