Monochromatic.

From EAPWiki

Definition: a single color; a one color scheme

Part of Speech: adjective

Example:

T00996_9.jpg

James Duffield Harding (English, 1797 or 98 - 1863), Twickenham, 1839

This example is from: http://www.tate.org.uk


Example in Context: James Harding used a brown monochromatic color scheme to illustrate the dusty African plain.

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