Of course we say grey series is not only refers to smoke gray, but includes red, yellow, blue, grey ash, ash.

当然我们说的灰色系列不是单指烟灰色，而是包括红灰、蓝灰、黄灰等在内的。

youdao

Before the C.O. can take disciplinary action on the two, alarms sound around the prison and a giant plume of gray smoke rises from the guard's break room.

还没来得及教训他俩，监狱内响起了警报，滚滚的浓烟从警卫休息室冉冉升起。

youdao

Unrelated to the cloud cover, a dull gray smoke plume appears east of Alaska. The plume probably results from wildfires in Canada.

接下来的内容与云层无关，在阿拉斯加以东有一片浅灰色的烟雾。那可能是由发生在加拿大的野火造成的。

youdao

A blue-gray haze from natural and now manmade sources hangs over them like smoke.

VOA: special.2009.09.28

The flame went out in a puff of gray smoke.

VOA: special.2010.05.01

A large fire then broke out, engulfing several shops and spewing a cloud of gray smoke over the area.

VOA: standard.2009.10.28

Artillery set a four-story house in Aracinovo on fire, blanketing the eastern part of the village with heavy gray smoke.

CNN: Residents flee Macedonian fighting

Despite our growing up among the gray, smoke-belching factories of northern New Jersey, you somehow grasped the beauty and stillness of nature.

FORBES: Dear Dad, With Love

It was replaced by a gray lull, all smoke and pig iron.

NEWYORKER: Something Like Happy