H

hard proofing

Previewing or proofing an image by printing a hard copy of it.

HLS

A color space often used by artists. Its components are Hue, Lightness, and Saturation (chroma).

HSV

A color space often used by artists. Its components are Hue, Saturation (chroma), and Value (lightness).

hue

A pure color. A hue is a specific position on the visible portion of the electromagnetic spectrum.