I'm colour blind Would the world be a better place if we was all colour blind or, if we was all one colour?

Culture is something to consider. Skin color is part of the issue but not the only thing. In New Guinea, the indigenous people are all of the same skin colors but tribalism is the reason that many groups still have armed conflicts between each other. If people would learn to love one another instead of hate it would solve the problem entirely. It is a solution that is just as unlikely to happen as everyone is the same skin color, unfortunately.

It's obvious what kind of point you're trying to make, but color blind doesn't necessarily mean all colors. Nor for the point you're making would it make a difference. People would still only see black and white. In that case it would just be more literally. You'd still be able to tell the difference between skin colors. Racism is a bit more complex than what is that persons skin color usually.