tamno

1. (of a place, lighting) dark
   Na fotografiji je sve ispalo tamno i nejasno. — In the photo everything came out dark and blurry.
   U hodniku je bilo tamno. — It was dark in the corridor.
2. (of colour) in a dark colour; darkly
   Zidovi su bili tamno obojeni. — The walls were painted a dark colour.
   Uvek se oblači tamno, čak i leti. — He always dresses in dark colours, even in summer.

For lack of light in a room or outdoors Serbian usually uses "mračno" or "pao je mrak" ("U sobi je bilo mračno"); "tamno" mostly refers to colour and shade. With colour adjectives it is usually written as one word: "tamnoplav", "tamnozelen".