Nearer in sight are dull grey rooftops, and farther on stand row upon row of buildings.

近处是深灰色的屋顶，远处是层层叠叠的楼群。

youdao

It was not dull grey as distance had suggested, but a mottle of khaki and black and olive-green.

那其实不是从远处看起来的暗灰色，而是黄褐色、黑色和橄榄绿组成的杂色。

youdao

It was a dull, grey day.

那是一个阴沉昏暗的日子。

《牛津词典》

Gone, is the old boring dull grey box look and in comes bright and vivid colors and designs that excite.

ENGADGET: Commodore knocks a home run with MLB-themed gaming rigs

He could not have been more unlike the dull, grey-suited types in most British boardrooms.

ECONOMIST: John Harvey-Jones