Yellow

Caution! Don’t ignore yellow!

Yellow is a colour located on the visible spectrum between orange and green, that has a wavelength of 520 to 590 nanometres (nm), as well as having the hex code #FFFF00 and the RGB value (255, 255, 0).
Yellow is among the three primary colours of pigments, shown in the RYB colour wheel, and in light it can be made with green and red in the RGB spectrum.
Yellow comes from the terms ‘geolu’ and ‘geolwe’, which both are from Old English, which in turn is derived from the Germanic ‘gelwaz’.
Natural pigments of a yellow colour can be made from ochre, saffron, turmeric and Garcinia tree resin; and many other minerals have proven toxic, including crocoite which contains lead, while the synthetic chemical tartrazine is commonly used today.
The colour yellow appears often in nature, and can be seen in fruit like lemons, flowers like sunflowers, and animals including tigers, giraffes, some reptiles and fish, insects like bees and butterflies, and birds including canaries and ducklings.

Yellow can be highly symbolic, representing gold, gods, caution, warmth, courage, happiness and sunshine.
Numerous natural objects coloured yellow, including egg yolk, daffodils and bananas, contain carotenoid pigments; while other objects commonly coloured in this colour include rubber ducks, some forms of road machinery, and in some regions taxis and buses.
Black alters yellow shades most dramatically and most unpleasantly of all colours, with only small mixes making unattractive colours.
Shades of yellow include mustard, cream, gold, amber, maize, goldenrod, straw, saffron, and lemon, and shades of hair in this colour are usually called ‘blonde’ or ‘golden’.
Yellow is the first colour to be recognised visually, hence it being used on warning signs, and contrary to popular belief, a room in this colour does not make a baby cry more.

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