Why is the color red called red?

Words in language evolve as people pronounce them differently over the years and centuries. The English language uses the word "red" for the color of blood, sunset clouds and rubies because of that evolution. The word "red" as a color derives from Indo-European, which is the root language of most languages spoken from the European Atlantic and North Sea coasts east through India.

The Old English form was "read"; the Old Frisian and Old Saxon forms were" rad."

At its core, words are sounds that are arbitrarily given specific meaning, so there is no known reason for the Indo-European word to have begun with an "r" sound and ended with a "d" sound instead of some other combination. It is just what happened.