Nouns

(n)coloring, colouring, food coloring, food colouring, food color, food coloura digestible substance used to give color to food“food color made from vegetable dyes”
(n)color, colour, coloring, colouringa visual attribute of things that results from the light they emit or transmit or reflect“a white color is made up of many different wavelengths of light”
(n)coloring, colouringthe act or process of changing the color of something