Finally made it to the final floor and all of my armor has been turned off and my build is ruined! What is happening? I genuinely love this game and only want to know what happened here? 
In combat, it blacks out all items that don't have clickable actions like armor and accessories. They should still apply their bonuses though. It's just a way to visually see what items you can still click on to take an action. Basically it's saying you can use your spear, shiv, shields, and whetstone at that particular moment.