I don't think you can.

There actually might be demo on it. I'll check and see. It might be possible to code the color in if dreamseeker thinks the statpanel is with the game itself and not with the Byond Window.

Nope, no way to do it. You can't change the actual appearance of a stat panel besides what's in it.

I asked this question many, many years ago (more like two), and got the same answer I now hand down to you.

You see, the Panel is part of Dream Seeker, RaditzX, it's just part of the built in window stuff. It wouldn't be that hard to make it so that you could format the panel a bit, at least from the design side, but I'm certain the development team of BYOND doesn't want to invest the time into that right now, as the entire framework of BYOND is going to basically get a facelift during the fabled 4.0 shift. I myself, won't be using the statpanel anymore after 4.0. I'ma be making fullscreen games.

As for the right now, I'd suggest if you don't like the statpanels, learn the magic of HUD/Click-based design. I'm working on a game where you can pick up an object by standing on or next to it, and dragging it over yourself, put it on the ground nearby by dragging over a drop icon in the inventory on screen, or dragging it to a nearby ground tile, throw an object by dragging it out of your on-screen inventory and over an tile that is more than 1 tile away, you can examine it by clicking on it from any distance or in your inventory, or use it by double-clicking on it. It's pretty spiffy.