Jet and Pitch dark

Jet adjective - Of the blackest black; similar to the color of jet or coal.

Pitch dark and jet are semantically related In some cases you can use "Pitch dark" instead an adjective "Jet".

Jet and pitch dark are semantically related in black topic. Sometimes you can use "Jet" instead an adjective phrase "Pitch dark", if it concerns topics such as dark, very dark in color.