chroma

[kroh-muh]
noun
1.
the purity of a color, or its freedom from white or gray.
2.
intensity of distinctive hue; saturation of a color.

Origin:
1885–90; < Greek chrôma color

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World English Dictionary
chroma (ˈkrəʊmə)
 
n
1.  See also saturation the attribute of a colour that enables an observer to judge how much chromatic colour it contains irrespective of achromatic colour present
2.  (in colour television) the colour component in a composite coded signal
 
[C19: from Greek khrōma colour]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

chroma
1889, from Gk. khroma "color" (see chromatic).
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences for chroma
Exterior shots are chroma keyed model shots, while interior ones are produced on a set.
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