DigitalColor Meter is one example of this. The other day, I wanted to find out the web safe color of a particular item on the screen of my Mac for a web design project I was working on. My first step was to go searching the Internet for such a tool (preferably free). Then, in the midst of said search, I was reminded that this little tool was not only already on my Mac, did exactly what I wanted, but also did it better than any of the tools I was able to find.
Update: Frijole dropped some mindblowing additional info about this app on the reblog.
Update 2: I would also like to add that if you have Photoshop open, you can achieve that same result with the eye dropper tool.
- Choose the eye dropper tool
- Select a point on the canvas
- With the mouse button held down, drag the eye dropper to any part of the screen with the color you are trying to extract.
- Once over the color you want, let go of the mouse button and the color will automatically be chosen in Photoshop for you to use with your project.

