Con Level Ranges

[loramin]

This seems incredibly basic, and I have searched both the wiki and the forums (including using Google), yet for some reason I can't seem to find an answer to this question: what are the level ranges of the con colors?

In other words, I'm trying to find something like "Blue con mobs are 1-5 levels lower than you" or "Yellow con mobs are 101%-115% of your level, rounded down", or whatever. Can anyone please point me to the painfully obvious place that lists this info that I'm somehow failing to find?