To customize your palette, click the Edit Theme icon on the left.
To change the color, double-click on the palette choice you could like to change. A color chooser box will appear. Select the color you would like, then click Apply Changes to Presentation to save your changes.
Users can either manually change the color or paste in a hex value.
Select a color and click OK to save the changes.
Paste in your Hex code and click OK.