What is yellow?
yellow is (adj) of a colour like that of the sun or of gold His new car is bright yel- low. She’s wearing yellow sandals. At this time of year the fields are full of yellow flowers. (NOTE: yellower – yellowest) (noun) the colour of the sun or gold Do you have any hats of a lighter yellow than this one? The yellow of the lichens on the rocks makes a very beautiful photograph. verb to become yellow The pages of the diary have yellowed with time but it is still legible.
source: Easier English, Student Dictionary Upper Intermediate Level