dye

染料、染剂

She mixed the blue dye in a large plastic bucket.

她在一个大塑胶桶里调和蓝色染料。

色素多指食品或化妆品

The candy contains artificial dyes and too much sugar.

这种糖果含有人工色素和过多的糖。

染、染色

She dyed her hair bright red before the concert.

她在演唱会前把头发染成鲜红色。

上色、吃色

This kind of cotton dyes evenly and never fades.

这种棉布上色均匀，而且不会褪色。