Sentence examples for it is dark from inspiring English sources

The phrase "it is dark" is correct and can be used in written English.
It is a simple statement that can be used to describe the current lighting conditions. It can also be used to convey a feeling or mood. Example: "It is dark outside, so we should turn on the headlights before driving." "The room was lit by only a few candles, making it feel warm, but still dark." "After the sunset, the forest becomes a mysterious and eerie place as it is dark and quiet."