Color Palette Addon does not have it’s own menu option because it is just an extension to the Cornerstone theme. Instead, an extra option is included in the theme customization menu. To find this option, navigate to Appearance > Customize from the WordPress dashboard.
The option is titled Alternate Color Scheme and is usually located at the bottom of the customizer menu (reference illustration at right).
Clicking the option extends a sub-menu where you can choose between original, light and dark color schemes. Once you choose a new color scheme make sure to click the “Save & Publish” button at the top to apply the changes.
Screenshots of the Cornerstone demo using the three different color schemes are showcased on the Color Palette Add-on product page for easy reference.