Clue is a website that will take a screen shot, show it to users for a few seconds and ask them what they saw.  It’s a way to get some input on the first impression your website gives.  But when most of the answers relate to color I’m not sure how much you can glean from that information…

Still, it’s free and super easy to set-up.  And you might discover some interesting reactions to your website.

http://www.clueapp.com/