Add cyan color to <url> parameter

This fixes the issue where the <url> parameter was not being shown unless you
added --no-color to the call. On some shells, <url> is the same color as the
background, but additionally the change of color should make this particular
command a bit easier to read, and clearer as to which params are required.

Before (v0.8.5):

![Screen Shot 2013-03-15 at 1 32 20 PM](https://f.cloud.github.com/assets/113026/264680/74b498c2-8d96-11e2-864e-fa192a11a75f.png)

After (tubbo:master):

![Screen Shot 2013-03-15 at 1 33 48 PM](https://f.cloud.github.com/assets/113026/264681/82c44926-8d96-11e2-8c05-67584524d4a7.png)