Red

Color with a long wavelength in the visible spectrum.

rouge crimson

Red is a color that is perceived by the human eye as having a long wavelength in the visible spectrum, typically associated with warmth, energy, and passion.

/rɛd/

From Old English rēad, from Proto-West Germanic *raid, of Proto-Germanic origin.

Red is a color like the one you see in apples and fire trucks, and it's part of what makes rainbows so colorful.

What is red? It's a color on the visible light spectrum
What makes something look red? Objects appear red when they reflect red wavelengths of light
Is red a primary color? Yes, it's one of the three primary colors

scarlet crimson ruby

blue green

color

vermilion burgundy cherry

spectrum rainbow

color natural phenomenon visual attribute