Question: what country flag is blue black and white?
Answer: The national flag of Estonia (Estonian: Eesti lipp) is a tricolour featuring three equal horizontal bands of blue (top), black, and white. The normal size is 105 by 165 centimetres (41 in × 65 in). In Estonian it is colloquially called the "sinimustvalge" ( lit. '"blue-black-white"'), after the colours of the bands.