1.

Defn: The quantitative determination of the depth of color of a substance.

2. A method of quantitative chemical analysis based upon the comparison of the depth of color of a solution with that of a standard liquid.

COLORING
Col"or*ing, n.

1. The act of applying color to; also, that which produces color.

2. Change of appearance as by addition of color; appearance; show; disguise; misrepresentation. Tell the whole story without coloring or gloss. Compton Reade. Dead coloring. See under Dead.

COLORIST
Col"or*ist, n. Etym: [Cf. F. coloriste.]

Defn: One who colors; an artist who excels in the use of colors; one
to whom coloring is of prime importance.
Titian, Paul Veronese, Van Dyck, and the rest of the good colorists.
Dryden.

COLORLESS
Col"or*less, a.

1. Without color; not distinguished by any hue; transparent; as, colorless water.