【填空题】

People may easily ignore that we are living in a world full of different
c ______ ，such as red, blue, green, black, v ______ and so on. We can never tell how many kinds of them there are. But we all know that colors are very important in people's e ______ life.
    The sky is blue and white. The trees are green and yellow. We can even say that s ______  is freshing green, summer is hot blue, autumn is golden yellow and winter is c______white. I______one day all the colors d______，what will it be to live in this world. We feel bored. We can't even tell the d ______ between the sky and land, between trees and houses.
    The world is c ______ . And we can't live w ______ colors.