monotone; monochromatic
Refers to a single color or a lack of color variation, often used in fashion, design, and photography. Can also describe a monotonous sound or voice.
彼女はモノトーンの服を好んで着る。
She likes to wear monochromatic clothes.
この写真はモノトーンで仕上げた。
I finished this photo in monotone.
She always wears monochrome clothes.
Coordinating the room in monotone colors gives it a calm atmosphere.
The teacher continued explaining in a monotonous voice.