Didya know that a DB ("dark blue") con has to be 90+ for a level 95 player? I was kinda shocked when I realized this. Only a DB mob gives "full XP" and this seems to the tightest spread I've ever seen for DB. I seem to remember not all that long ago the spread used to be 10 or even 15 levels.
For a 95 seems to work like this:
Mob level below 75, GREY
80-89, LIGHT BLUE
90-94, DARK BLUE
100 or more, RED
Not sure about 99, they might have made this RED now.
I think they've done this in response to the swarming (and, to some extent, head-shotting) crazes since it would be darn hard for all but the most highly raid-geared and AA'd shadowknights to handle swarms of 90+ level monsters.