Red

What do cherries, lobsters and blood have in common? They’re all red!

Red is a colour that sits on one edge of the visible spectrum and it has the longest wavelength at 620 to 740 nanometres (nm), and is known under the hex code as #FF0000 and has the RGB value (255, 0, 0).
Red features as one of the three primary or basis colours in terms of light, as in the RGB colour model, as well as art, as represented in the RYB colour wheel.
Shades of red range from a light pink to a dark maroon, and other common shades include crimson, scarlet, vermilion and burgundy.
Dyes used to colour objects red have been derived from rocks containing high quantities of iron oxide including ochre, plants like madder, and the crushing of certain insects like cochineals.
Besides humans, primates are among the very few groups of animals that can detect the colour red.

Red is associated with a multitude of symbolism, with themes including blood, courage, power, love, happiness, warning, anger, war and passion.
Red is one of the most common colours to be used on country flags, with over 77% of flags featuring the colour, which commonly symbolises sacrifice and bravery.
One’s eye is attracted to the colour red more than any other colour except yellow, and it is said that the colour appears to move forward, which causes the colour to stand out among others.
Red is considered one of the most important colours throughout most civilisations, and some leaves, fruit, flowers, birds, insects, reptiles and amphibians feature the colour.
As many as 8% of men and 0.5% of women suffer from red-green colour blindness, which causes the colour red to appear differently.

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