At what level will level 78 mobs turn blue to me?

At what level will lv78 mobs turn light blue to me?

i believe.. it turns blue when you are at level 83

8+ levels below you = Dark Blue
7-5 levels below you = Light Blue
4-3 levels below you = Green
2 levels below you to 2 levels above you = White
3-4 levels above you = Yellow
5-7 levels above you = Pink
8+ levels above you = Red

I think.