HueGo allows users to sample colors from their display or from a color prism and save a .huego document for later reference or for sharing or just use the live RGB view to get a quick color value!
Sample area is adjustable from 1 pixel to an 11x11 area
Colors can be edited in rgb, hsv, or cmyk mode.
Color values can be copied in a variety of formats ranging from basic color values to css values to cocoa color snippets.
If you don't see the format you'd like, you can create custom formats to copy color codes your way.