Fading of the URL in Safari 6's Unified Search and URL Field With Safari 6, the omnibar fades the non-server part of the URL, so that the actual server name is more visible. Presumably, this is to reduce phishing attacks.

However, I find that the remainder of the url is hard to read, and to be honest, when developing websites, that is the part I care much more about.

Is there any way to have it so that the whole url is the same?
As mentioned above by dan8394, you can click the omnibar, reactivating the full URI. Unfortunately, there is not an option for changing this in Safari, nor does a hook exist in AppleScript. To the best of my knowledge, the only way this can be changed would be through a Safari extension. However, from what I have found, this is hard-coded into Safari itself and there isn't an option or a flag to change that will affect it. Sorry.

Good luck and happy browsing!