It's actually pretty boring. When I say "accent color" I mean a single pixel border around the selected container. The waybar is text, and the text is all bright green on a black background. The active desktop has a single pixel magenta stroke around it. I've thought about turning that into just magenta text as well. Every window element I can make #000000 black without making things more confusing is.

Default text in the terminal is green, and if I select it with a mouse it's magenta. It's more of a "terminal" vibe than the win 3.1 Fluorescent vibe. I said that because they share garish colors.

Also, I'm always on the lookout for even more minimalist graphics to use in my config, if anyone has hyper-minimal things they like about theirs...

I’m using cwm with no bar. Just xclock and xbatt (an icon that reflect the battery percentage) in a corner. The only decoration is a border around the windows. Keyboard driven, but some menus are accessible by clicking on the desktop.