How to darken FF6a Battle User Interface?

Hello, I have tried some patches over the years to correct the color in this game, but none of them address the Battle UI. I might prefer the GBA version of the game more than the SNES if it weren't for the brightness of just the Battle Interface.

I'm new to hacking, but I'm willing to give things a try. It's just that it seems like it might be hard/impossible since someone else's work has the same problem. Any interest in this or tips for exploring a fix myself?

Thank you for reading.