Light & Colors

Luminance is absolute measure/intensity of illumination.

Brightness is perceived luminance. Brightness depends on ambient light.

Luminosity or lightness is perceived brightness across a tonal scale from white to black. White appears brighter than black.

Hue is saturated or pure color.

Tint is adding white to color. This increases lightness or luminosity.

Shade is adding black to color. This reduces lightness or luminosity.

Tone is adding grayscale to color.