In setting up a theme with our corporate colors, on the "Design" tab I can select "colors" - "Custom Colors" which allows me to setup up the primary colors for my theme.

Heading back to the "Home" tab I now have a nice selection of corporate colors in the Font area of the tab. In addition to the primary colors are default options for 40% lighter, 60% Lighter, 80% lighter, 25% darker and 50% darker.

Is there anyway to customize these so that I can have the 10% lighter, 20% lighter, etc...?

Thanks.