Question: In Preview on OS X 10.9 Mavericks, is it possible to change the color to something other than yellow, green, blue, pink, purple? I know it is possible to highlight in other colors because I did it while using Preview for the first time after upgrading to Mavericks, but now that I've changed I can't seem to change back.

![enter image description here](https://i.stack.imgur.com/Q5JGl.png)

Answer: 
Unfortunately, that workaround no longer works in Yosemite.
Instead, you can use this small utility to modify the color externally.
<http://qiita.com/cielavenir/items/eb9c24085c202d72c0ab>
(confirmed to be working also on Mavericks)
I'm using El Capitan. In Preview choose View-->Customize Toolbar...
Select the highlight tool and add it to your tool bar.
Now you can hit the dropdown arrow and choose a color for highlighting.