モノトーン (monotoon) Japanese meaning: monotone | KotomoraShe likes to wear monochromatic clothes.
I finished this photo in monotone.
Usage patterns
モノトーンの〈物〉a monochrome/monotone (item, e.g. clothing)
She always wears monochrome clothes.
モノトーンでまとめるto coordinate/pull together in a monotone color scheme
Coordinating the room in monotone colors gives it a calm atmosphere.
モノトーンな〈声〉a monotonous voice
The teacher continued explaining in a monotonous voice.