Instant Eyedropper: Find the color code for anything on your computer
Once Instant Eyedropper is running, all you have to do is click on the icon in your system tray and keep your mouse button down as you drag your cursor to a spot on your screen. The program will display the color code whether you're hovering over an image, web page, or pretty much anything else. Note that it doesn't appear to work with videos, but seriously what were you trying to use it on a video for anyway?
Instant Eyedropper will also automatically copy the color code to your clipboard, so you can paste it into your image editor or web design application.
[via The How-To Geek]