What idioms are there to describe "it's getting dark"?

The moon is black and windy, black, black, black, black.

The moon is dark and windy [yuè hēi fēng gāo], and the wind is high: it is very windy. No moonlight; It's windy again Used to describe the weather when bandits take the opportunity to commit crimes.

The origin of the idiom: Yuan Yuanhuai's "High Five Record": "Ouyang Gong and others ordered that two sentences should be written each, and there are more than just disciples who commit crimes ... There is a saying:' When the moon is dark, the wind is high and the sky is set on fire.' "

Idiom sentence-making: On a dark and windy night, the Great Wall is gnashing its teeth and cursing. (Yang Shuo's bleak autumn wind)

It was dark, all black. Metaphor is nothing good.

The origin of the idiom: Tran Dang Khoa's broken wall: "At this time, suddenly a strong wind blew, a dark cloud hit and swallowed up the moon, and the mountain suddenly became dark."

Idiom sentence: it's dark outside the window, so you can't see anything clearly.

In the dark [h ū n ti ā nà n di], it is darkness. It is also a metaphor for social darkness, disorder, people's unconsciousness, fierce struggles and disputes, and absurd and decadent life.

Origin of Idiom: Feng Ming Menglong's "Yu Shi Yan Ming" Volume XIII: "Ghostly and handsome people become colorful clouds again, and they are very dark."

Idiom sentence-making: If you open the window and make it clear, you must make sacrifices. (Lu Xun's Book Nine of Two Places)

In the dark [hē i tiā n m not di] describes that it is too dark to see anything.

The origin of the idiom: The eighty-seventh time in Shi Naian's "Water Margin" in the Ming Dynasty: "All the troops were in the dark and could not distinguish things, so they had to dismount and surrender."

Idiom sentence: Hearing this, Wang Xiaoer got up, groped in the dark, and kept busy, clutching his trousers as a shirt, but he couldn't put them on either side. (Wu Ming's "Journey to the West" is back to 84.

It's dark here. Describe the darkness without lights.

Origin of Idiom: Horqin Banner Grassland, Duanmu Hongliang: "Oh, what are you going to do at this time? It is getting dark. "

Idiom sentence: Second child, what's the matter? You called me here in the dark. (Lao She's "Divine Boxing" Act II)