A bit of a diversion from my normal stuff, I recently wanted to find the RGB value of a colour in a logo so I could match it in document. I tried the trial and error approach in mspaint but failed badly. So went to google and found a tool called colorpic from iconico.
Its a great little utility that captures the RGB value of the pixel under yout mouse pointer, its even got a magnifier that enlarges the bit of the screen around the pointer so you can see what your doing. Spot on.
Whats more is its free :)
You can download it here. http://www.iconico.com/colorpic/