I found that an element wasn't the colour I wanted to use in a new layout so used the Colorize Tool to change it.
Some easy instruction as follows:
Changing an element's colour using the Colorize Tool
1. With element's layer selected, select the Colize Tool from the Colors menu
2. Click and drag the Hue slider until you have changed the element's colour to your liking.
In my example the Hue was changed to 280 to achieve a nice purple element.
3. Click OK to make the colour change permanent.
That's all, nice & easy wasn't it!
For screenshot check out my blog here