The quality of this cloth is fine, but the colour is not quite right.; the cloth is quite good except for the colour.

这块布质量挺好，就是颜色差点儿。

《新英汉大辞典》

"Food additive" means any synthetic compound or natural substance put into food to improve its quality, colour, fragrance or taste, or for the sake of preservation or processing.

食品添加剂：指为改善食品品质和色、香、味，以及为防腐和加工工艺的需要而加入食品中的化学合成或者天然物质。

youdao

The factory superintendents rated the quality of each worker’s output each day and turned the cube so that the colour responding to their work was showing for all to see.

工厂的监督人根据每天对每个工人产出的质量评价将木盒转到不同的颜色，以便所有人都能看到。

youdao

Other big brands were accused of using poor dyes or having bad colour quality.

ECONOMIST: Foreign brands encounter a new form of protectionism

Christie's specialist, Jean Marc Lunel, said the Archduke Joseph is prized because it boasts the highest quality of shape, colour and clarity that can be found in a diamond.

BBC: 'Perfect' Archduke Joseph diamond sells for $21m

With its underlying jade-like green colour, celadon fired by the family-oriented businesses of Longquan is prized as masterwork-quality art that can also serve as household ware.

UNESCO: Culture