Respect! This is very nice, especially since you only use 16 colors as far as I can see. Works great with AGA. Call me conservative, but shouldn't you have a blue theme? Blue/gray windows always seems more Amiga to me. I never liked that green theme used in AmiKit.
Are the icons rendered to this palette?
By the way, is there any "perfect" 16-colour palette for all-round use? Guess that must include more shades of gray than other colors?