dullness
US
UK dullness n: figurative (being unexciting)
SC 沉闷，乏味 fá wèi
The dullness of this movie is making me sleepy.
dullness n: (lack of vividness) (色彩)
SC 黯淡，不鲜明 àn dàn，bù xiān míng
SC 无精打采的，没有生气的 wú jīng dǎ cǎi de ，méi yǒu shēng qì de
The artist's depression is represented by the dullness of the colors in the painting.