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.

HSV

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

hue

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