Here's a theme I'm working on for our upcoming Workbench distribution, which people have dubbed "Modern Workbench" but I don't know what it'll be called. Probably Modern Workbench if we can't think of anything better.
There will be a choice of glow effects for your icons. Along with the classic dull yellow glow, there's this new "radioactive" glow, complete with green themed window borders.

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I've designed everything to be compatible with any Amiga running Kickstart 3.0/3.1, although VisualPrefs may not run on 68000 so we'll need to include a simpler window-border hack that will still work with Birdie.