Why is the sky chartreuse?

I had someone ask me just yesterday why I chose such an odd name for my weblog. There are two reasons for the title of the blog:

1. It deals with objectivity and subjectivity. I read in another blog about how do we know what we see is what the other person sees. That is, if I see the sky and say it is blue, how do I know you see the same blue? Maybe to you it's chartreuse.

2. It deals with understanding why things are. Why is the sky blue (or chartreuse, or shit brundle)? Why are we here? Is there a greater purpose in our lives? Do I look fat in this outfit? Tastes great or less filling? You know... the important things.

So hopefully that answers that question.