It’s easy to change the color of text in most Mac applications. But what if you want to use a custom color, or copy a color from a favorite web page or photo, and reuse this color in an email or other document? Here’s how.
First, you need to bring up the Mac OS X color chooser. This is usually found in an application’s menu bar under “Format.” For example, in TextEdit, just highlight a word, and click on Format > Font > Show Colors in the menu bar. In Mail, just highlight a word and choose Format > Show Colors.
When the Colors dialog appears, click on the color wheel in its upper left corner. Next, use the magnifying glass to hover over a color you’d like to copy. Click with your mouse to copy the color to the horizontal color bar at the top of the color chooser (next to the magnifying glass icon).
Next, click-and-hold in this horizontal color bar and start dragging slowly—a tiny square will appear under your cursor. Just drag-and-drop this square onto one of the white square boxes at the bottom of the Colors dialog.
This saves that color for future use, so when you want it, all you have to do is click once on that square (no more messing with the color wheel). Hope that makes sense!