Enmity list and subtargeting, glitched?

[Bixby]

Use your mini target in combat list. Red means you have threat, Green means you don't, Yellow means you going to lose threat, Orange means you are going to gain threat.

The colors don't change their meanings for tanks. Green means you're on the enmity list at all. Yellow means you've got some noticeable amount. Orange means you're close to pulling enmity. Red means the mob is attacking you. For tanks, the colors are basically red and not red. There's no way to tell from those dots whether you're about to lose enmity, just that you've already lost it.