coloring

That colors something.

That conveys or imparts color.

An act or process which applies color.

Any substance used to give color.

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The Department of Health and Human Services and the Food and Drug Administration announced on Tuesday a series of measures to phase out eight artificial food dyes and colorings from America's food supply by the end of next year. […] The proposal also outlined a commitment for companies to supply food for school lunches that does not include artificial dyes or coloring.

The appearance as to color.

The Rolands, both U.S.-educated lawyers with faculty positions in the national law school, are olive skinned, with the coloring of some Italians or Sephardic Jews.

A disguise or discoloration.

An assignment of a color to each vertex of a graph, usually such that no two vertices connected by an edge are given the same color.