1)You look good/very well/nice/great/terrific/fresh-complexioned 看起来气色很好

2)You have a good color/high color脸色红润

3)You have a good complexion气色很好

4) He has little color in his cheeks.脸上几乎没有血色

5) I feel a bit off color.我觉得有点不舒服。