See
http://www.project1999.com/forums/sh...d.php?t=145028
Also,
http://www.project1999.com/forums/sh...47&postcount=1
Light blue wasn't a thing until 2001. Haynar removed the blue color and changed it to green some time ago. But you can tell the difference between a green and a light blue con based on the text in the message.
IIRC if it say's "It's not certain though" in the Con message that means it's not a green mob but it's actually light blue. I'm not on EQ right now though so someone correct me if I'm wrong.