Pipette is another great Portable Color Picker created by Stefan Trost Media. It enables you to get the colors from your screen, change or modify the select colors, or convert them from one color mode to another.
Nattyware Pixie is a Free Portable Color Picker. Pixie can be used to display the HEX, HTML, RGB, CMYK, and HSV values of any pixel color presented on your screen.
CatchColor is a handy little FREE portable application that can reveal the Hex value of any pixle displayed on your screen. Once the Hex value of the color you have selected is revealed, you can import or copy the Hex value to another applications or attribute it directly into code such as html.