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Red
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Red

 
Red is a color at the lowest frequencies of light discernible by the human eye. Red light has a wavelength of roughly 700 nm. Oxygenated blood is red due to the presence of hemoglobin. Red light is the first to be absorbed by sea water, so that many fish and marine invertebrates that appear bright red, are black in their native habitat.

Lower frequencies are called infrared, or far red.

Usage, symbolism, colloquial expressions

Red that tends towards red-orange and has no hint of blue is "scarlet." Red that has no hint of yellow and leans instead towards red-violet is "crimson."

Color Coordinates

Hex triplet = #FF0000
RGB    (r, g, b)    =  (255, 0, 0)
CMYK   (c, m, y, k) =  (0, 255, 255, 0)
HSV    (h, s, v)    =  (0, 100, 100)


{| style="margin:0 auto;" id=toc align=center |align=center| Colors | List of colors White | Gray | Black
Red | Orange | Yellow | Green | Blue | Indigo | Violet
Aquamarine | Brown | Gold | Coral | Crimson | Cyan | Magenta | Maroon | Navy blue | Ochre | Pink | Purple | Tan