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》
2
"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.
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.