coloring
n. C / U A2 Elementary US //ˈkəɫɝɪŋ// col·or·ing
n. the natural colors of a person's skin, hair, and eyes. It can also mean the substance used to add color to something, like food or a drawing.
n. the natural appearance of a person's skin, hair, and eyes; also refers to the application of pigments or dyes to a surface or substance.
She has very pale coloring and blue eyes.
The chef added a drop of yellow coloring to the icing to make it look more like a lemon.
The artist's choice of vibrant coloring in the foreground creates a sharp contrast with the muted, grey tones of the distant mountains.
Usage
Uncountable when referring to a person's natural appearance; countable when referring to specific dyes or substances used to change color.