One clue word could be the main character saying "well I think" or any disagreement
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.
Pigment, blinder, and the additives.
I dont know if this will help, but He Played The Organ, Harpsichord and the Violin.. I hope this will help a bit. Good Luck!
