It's black and white.这句话对吗,还是应该用They're black and white?

It's black and white.这句话对吗,还是应该用They're black and white?

它是什么颜色的?是黑白色的.更上一层楼!请记得采纳,what colour is it?lt' s black and white.它是

那需要看代替的是单数还是复数。看上文具体语境。