pink -
sound like a car engine that is firing too early; "the car pinged when I put in low-octane gasoline"; "The car pinked when the ignition was too far retarded"
pink -
By comparison to redcommunist, describing someone who sympathizes with the ideals of communism without actually being a Russian-style communist: a pinko.
Pink is a mixture of red and white. The use of the word for the color we know today as pink was first recorded in the late 17th century. Although the pink is roughly considered just as a tint of red, in fact most variations of pink lie between red, white and magenta colors.
OmegaWiki Dictionary
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pink A colour obtained when mixing red and white paint.