I've noticed on several occasions that I will be soloing in an area and a specific mob will be (for example) green to me. They will stay like this for several lvls then after I've maybe lvled 3 times they will suddenly be pale pink and harder to kill - how is this possible?
If it had only happened on the 1 occasion I'd think it was my imagination but this has happened numerous times.
For information the area it mostly happened was Neutral Zone whilst I was soloing at low lvl SO.
I know of something similar in the Forest of Mirrors where ghosts with the same names actually are different levels. So some would appear green and other yellow at the time. But this was back in C3 and I don't know if that's still the case.