Are you a Web designer or a graphic artist? Are you usually hunting for nice colors on your screen that you would like to use? Then probably Pixie is a right tool for you. It is a color picker.
Forget about screen capture nightmares.
Run Pixie, simply point to the color and it will tell you the HTML, HEX, RGB, CMYK and HSV values of color. You can then use these values to reproduce the color in your favorite programs. Pixie also shows the current X/Y position of your mouse.