Low key as a term used in describing paintings or photographs is related to but not the same as low-key lighting in cinema or photography.
[1] A photographic image, painting or movie can be defined as "low-keyly" if its dominant values are black, dark brown or dark blue.
[2][3] Some authors describe the term "low key" as the so-called Rembrandian light[4] while others describe how to obtain such photographs or paintings.
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