Answer:
The word that is missing in the blank space is <u>Fugue.</u>
Explanation:
I believe the answer is Monochromatic
A color scheme could be categorized as monochromatic if it's derives only from single based hue using additional tints, tones, and shades.
The usage of these will alter the brightness and the saturation of the color just like what we see in the painting.
Contrasting colors. You focus on the person with the umbrella because it's a black figure against a white background.