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: 
There is another workaround, which is actually a bug I think, but mah...

1. Suppose you want to underline in blue. Highlight something in blue.
2. Right-click on what you just highlighted, and make it underlined instead.
3. Select the underline tool.
4. Do cmd-z twice. This will remove the underline you just did.
5. Underline what you want: it will be underlined in blue! :)

Steps 2 and 3 are actually interchangeable.

**Edit**: I have actually better:

1. Write any text with color 1.
2. Change its color to color 2.
3. Select the highlight or underline tool.
4. Do cmd-z. This should change the text color back to color 1. (If it is not the case, make sure the text you have written is not selected.)
5. You now have the underline/highlight tool selected with the color box accessible. Select your color (even if already selected), then highlight/underline.

This was my Preview bug finding day :) Enjoy!
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.