灰色 (huī sè) means “gray; ash gray; grizzly; pessimistic; gloomy; dispirited; ambiguous”. It is an HSK 5 Chinese word in the HSK 3.0 vocabulary.
Practice each character:
天空是灰色的。
Tiānkōng shì huīsè de.
The sky is gray.
Updated: 2026-07-18