l don't like this pair of jeans.l don't like _____ (its\their) colour.

l don't like this pair of jeans.l don't like _____ (its\their) colour.
l don't like this pair of jeans.l don't like _____ (its\their) colour.

l don't like this pair of jeans.l don't like _____ (its\their) colour.
its
前一句的主语是pair,所以是单数形式,后面用单数的its代替.

its
上面那个说错了
trousers本来要用复数
但是a pair of 限定了它，表示这条裤子
如果有不懂的可以再问

their

l don't like this pair of jeans.l don't like _its_ (its\their) colour.

its
这里是一条裤子