gcolor2 is described as 'Basic colourpicker utility that allows you to select any colour on your screen, and, well, grab it's colour. It also allows you to save the colour you create to a file, which shows up as a list in the application' and is a Color Picker tool in the photos & graphics category. There are more than 50 alternatives to gcolor2 for a variety of platforms, including Windows, Mac, Linux, Web-based and iPhone apps. The best gcolor2 alternative is PicPick. It's not free, so if you're looking for a free alternative, you could try PicPick or Just Color Picker. Other great apps like gcolor2 are Realtime Colors, Magnifixer, Instant Eyedropper and Sip.