JVC KM-H2500 Manual page 11

Luminance
Luminance affects the brightness of the video signal.
Increasing luminance gives a brighter color while
decreasing luminance gives a darker color.
Hue
Hue controls the shade of color (red, yellow, green,
blue, etc.).
Saturation
Saturation affects the vividness of a color. Increasing
saturation produces a more vivid color while
decreasing saturation produces a less vivid color.
Fully decreasing the saturation produces gray.
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