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The most common colour names are:
"Primary colours" can be mixed to make the other colours. Red, yellow and blue are the three traditional primary colours. The primary colours for television screens and computer monitors are red, green and blue. Printers use magenta, yellow and cyan as their primary colours; they also use black.
Colours are sometimes added to food. Food colouring is used to colour food, but some foods have natural colourings, like beta carotene.
When something has no colour, it is transparent. An example is air.