It's usually colored because there's food dye in it, but it wouldn't be colored in its natural state.

通常是五颜六色的,因为其中含食用色素,但在自然情况下,它是无色的

耶鲁公开课 - 生物医学工程探索课程节选

I know table salt is white, but that is because you have power and you have multiple surfaces scattering, but a large crystal of sodium chloride is clear and colorless.

我知道食用盐是白色的，但这是因为你让它成了粉末,因为有了多个散射面，但是一个大的氯化钠晶体,是无色透明的。

麻省理工公开课 - 固态化学导论课程节选

You start with liquid metal one, liquid metal two, you have the atom ratios proper, they mix, electron transfer occurs and poof, it is clear and colorless. Sorcery.

从液态金属一，液态金属二开始，你有合适的原子比例，混合它们，电子转移发生且被证实了，产物是透明无色的，有点辣味。

麻省理工公开课 - 固态化学导论课程节选

It just goes bang, clear and colorless because salts are colorless.

它突然转变成透明无色的,因为盐没有颜色。

麻省理工公开课 - 固态化学导论课程节选