Grabber blue really annoys me for some reason.
It stands out more than a bright lime green Lamborghini Gallardo, and you can;t miss one of those on the road.
I like colors that make it look classy and sleek, not gawdy and in-your-face.
Black, Dark reds, dark blues and grays look best on a mustang. Mine is Alloy Mettalic. White and silver are fine too, but not my favorites.
I would probably get the sterling grey if I bought a 2011 with the Saleen S281 body kit. Yum!
The yellow, grabber orange, legend lime green, grabber blue are all nasty colors on a mustang IMO.