Badges update automatically and link to the mod page on MineUniverse.
If using 1.3, please report errors with mod icon configuration (icons being shown as iron armor when the mod is on the list of supported mods), by sending a private message with the mod with the error and the armor materials(s) affected (if the type is a vanilla type, item IDs). You can find out a mod ID and armor materials by pressing F3 + H while ingame and hovering over the items.
Armor Chroma is a mod which rehauls the vanilla armor bar. I will possibly be adding some other features in later versions. It adds:
This mod is based off of a suggestion by badhaloninja. It's on GitHub too.
Screenshot:

Mod support: