- 清一色 qīngyīsè flush(mahjong) a winning hand consisting entirely of tiles from a single suit
- 水天一色 shuǐtiānyīsè water and sky merge(idiom) the water and the sky merge into one color; describes a vast and beautiful landscape where the horizon is indistinguishable
- 落霞与孤鹜齐飞，秋水共长天一色 luòxiáyǔgūwùqífēiqiūshuǐgòngchángtiānyīsè water and sky mergethe sunset glow and the lonely duck fly together, and the autumn water is the same color as the vast sky; a famous poetic line describing a harmonious and beautiful landscape
