1. Select the area of the color you want to add accent to (Right click the color in the used colors swatches and click 'Select Area of this Color in Design'). Accents can be added to only a single color at a time, or a free selection with multiple colors.
2. Go to CarpeTools > Selection > Add Accent
Note: Accent uses a new color that is the average of the primary and secondary color.
3. Change the sliders in the dialog box that appears to create a variation that you like and click ‘OK’ when done.