Red
Saturday, June 17, 2017
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| Rosa 'Souvenir du Docteur Jamain' June 17 2017 |
Red is the color at the longer-wavelengths end of the
spectrum of visible light next to orange, at the opposite end from violet. Red
color has a predominant light wavelength of roughly 620–740 nanometers. Light
with a longer wavelength than red but shorter than terahertz radiation and
microwave is called infrared.
Red is one of the additive primary colors of visible
light, along with green and blue, which in Red Green Blue (RGB) color systems
are combined to create all the colors on a computer monitor or television
screen. Red is one of the subtractive secondary colors, resulting from the
combination of yellow and magenta. (See CMYK color model.) Traditionally, it
was viewed as a primary subtractive colour, along with yellow and blue, in the
RYB color space and traditional color wheel formerly used by painters and artists.
Reds can vary in shade from very light pink to very dark maroon or burgundy;
and in hue from the bright orange-red scarlet or vermilion to the bluish-red
crimson. Red is the complementary color of cyan.
Wikipedia
Blue
Wikipedia
Blue
