A high-key image consists primarily of light tones, without dark shadows. A photograph or painting so composed features a diminished tonal range of primarily whites and light grays.  High key as a term used in describing paintings or photographs is related to but not the same as high-key lighting in cinema or photography.
- Stroebel, Leslie (1993). Focal Encyclopedia of Photography. Focal Press. p. 350. ISBN 0-240-51417-3.
- Gartside, Tim (2003). Digital Landscape Photography. Course Technology. p. 45. ISBN 1-59200-107-6.
- "What does it mean for a photograph to be “high key”?". Photography - Stack Exchange. Retrieved 2012-02-17.
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