monochromatic
adj.adj. having only one color or a very limited range of colors. You use this to describe art, photos, or designs that are not bright or colorful.
adj. consisting of or using only one color or a narrow range of colors. Often used in artistic or photographic contexts to describe a lack of color variety.
The artist painted a beautiful monochromatic landscape in shades of blue.
The photographer chose a monochromatic palette to emphasize the textures and shadows of the old stone walls.
While the initial sketches were vibrant and colorful, the final installation was strictly monochromatic, relying on subtle variations in gray to create a sense of depth and movement.
From mono- + chromatic, mono- from Ancient Greek μόνος (mónos, “alone, only, sole, single”), chromatic from Ancient Greek χρῶμα (khrôma, “color”).