If you need to change a color for an element, you can use the Inline edit 'Edit Color' option.

In the Edit Color mode, click the color which you want to change. You can either pick a color directly or type in the RGB code and click OK.

The 'Update global' selection allows you to apply the change into global CSS property that may affect more pages. If you just need to change the color for one area, just uncheck the 'Update global'. After you finish editing, just click 'Save' to save your change.