Color health by stance
 

I've tried searching but, is there an addon that could color my health bar based on what stance I am in?

For example as a Mistweaver, I would love to have a green heathbar as usual while in Stance of the Wise Serpent, yet a red bar when in Stance of the Spirited Crane. I've asked some developers too for that function in their frames yet no one has taken it up :\.

I've tried fiddling with it myself but I'm so so new to lua.

Used under the Interface>Combat tab. Checkmark 'Class Colored Nameplates'. Apparently though when I look now its no longer listed there. I know "class color enemy units" is now listed under the "Names" tab but your own I'm not to sure anymore.

There are two mods I know of that probably still work that do this though Semi Class Color heakthbar or ClassColorBars.

Do you use any particular unit frame addon, or are you using stock frames?

He's talking about the player unitframe not nameplates.

Edit:
You can look at how something like one of these addons are modifying default unitframes to get you started
UnitFramesImproved
UnitFramesPlus

Which is why I linked two mods that colored the default unit frames.

Yea sorry about that, I read the first part of your reply and skipped over the second one (assumed it was along the same lines :p )