Opposite book I

In an alternate universe everyone has an opposite, but they cannot have them. This generation finds out more than anyone else.

People are color-coordinated. There names means there color in different languages. Many question many things they can't do, such has touch there opposite color color pencil, why they can't talk to them, why if you have a certain opposite type it can lead to death, why if you do touch your opposite color pencil you die, and why the wall is even there to begin with,and what the other two hidden types of opposites are.