This addon simply colorizes the default health bars when you are on the threat table of a mob:
* Blue = Tanked by another tank
* Purple = On the way to take aggro from another tank
* Green = Tanking
* Yellow = On the way to lose aggro
* Orange = On the way to take aggro
* Red = Not tanking
For non-tanks the order of the colors is reversed except there is no blue or purple.
When you are not in combat, or not on threat table, bars are colored by reaction, dark gray if you can't tap the NPC.
The SnackPlates Team
