Is there a Mac app that will let me use an eye dropper to to select and determine what the color is (in hex I guess) for a particular part of the screen?
If the application uses Apple's color picker, you can use its magnifier to pick up colors off the screen. It can be configured for HSB, RGB, CMYK, etc.
I think I have a separate app for that, but can't remember what. I'll post back.
edit: Art Director's Toolkit used to be bundled with new machines. I have an older version, and its "eyedropper" no longer works.
edit 2: iPalette - uses Apple Color Picker, so it gives you access to the above magnifier. I just tried it and it seems to work fine and is simple.
I downloaded iPallete but I can't figure out how to grab my color value. The picker shows the color in the grid but does not show the RGB values. The color I'm trying to find out about is on a web page.
Click on one of the large color sample squares to bring up the Apple Color Picker. Then, use the small magnifying glass to the left of the large, rectangular sample box near the top of the picker.
iPalatte's RGB tool will show RGB values. Apple Color Picker also has the values available as RGB, CMYK or HSB.