"what greater evidence could there be of a loving creator than our colourful world and the human eye that is equipped to appreciate it?."
There are two ideas expressed in this quote: 1)We live in a colorful world and 2)We have eyes equipped to appreciate it.
Actually, it's the brain that "appreciates it". But that point aside, I'd be interested in what mechanism is behind "appreciation". Is there a natural explanation for our "appreciation" of color?
That question led me to this article, which seems to indicate that the jury is still out: