When Jonas learns all about colors, he claims "it isn't fair that nothing has color", why does he say this in The Giver?

Here is what I think is going on here -- he is worried
about being unable to choose.

What bothers Jonas right now
is that people are not able to choose because they do not know about colors.  He thinks
that people should be able to choose things such as what color of clothes they want to
wear on that particular day.

So, to Jonas, the fact that
people can't see color is another bad thing about Sameness -- it prevents people from
being able to make choices in their lives.