what color do you think make you feel calm?为什么用makes,加“s”?

问题描述:

what color do you think make you feel calm?为什么用makes,加“s”?

句子主语是color,第三人称单数。

What color makes you
color是单数

do you think是个插入语,你把它拿掉看,主语color是单数,所以谓语make也用单数makes