coloring

noun

1
the act or process of changing the color of something
2
a 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
3
a digestible substance used to give color to food
food color made from vegetable dyes

Also useful for “coloring”:Unscrambler— Rearrange the letters in “coloring”