When wearing my custom armor, the lighting of the other armor slights turns a dark gray color, as you can see attached to this post.
Along with this, whenever my custom potion effect is active, and you're "holding" an item (for example a stick) the potion effect display (to the left of your inventory) flickers, as you can see in the second attached image.
Any help with these problems is greatly appreciated.
Sadly, this is actually not pertaining to your custom armor as it's with ArmorSlots in general as they glitch out due to the slot's background texture/IIcon. There might not be anything you can do about it. There MIGHT! On the Forge forums. But I personally wouldn't waste my time with this. Sorry if this puts you down or anything, but then again, it's my opinion.