In Photoshop’s Duotone mode you can create monotones, duotones, tritones, and quadtones—grayscale images to which you add one, two, three, or four colors.
Source: wiktionary
Quadtone
Synonyms for "quadtone"
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Sample sentences
3 total sentences available.
When using tritones or quadtones (in which three colours are blended together) all the secondary colours are mixed together.
Source: wiktionary
The two colours need not be black and grey; computer duotones can be created from a greyscale original in any two colours; tritones use three inks and quadtones four.
Source: wiktionary
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.