Administrators can manage their campaign site's colors via Site Builder, ensuring brand conformity.
To edit your site's colors, click the color circles. This will reveal your site's colors. Click a color to edit it. This expands a color wheel which you can use to change that color. You can also change the color by directly inputting the desired hex color in the hex field below the color wheel. When your desired color is chosen, click "Done". Remember that your changes are not saved on the site until you click "Publish" in the Site Builder bar.
Colors include primary, secondary, and accent. The individual site template/theme determines which colors are used and where (for example, accent color is used only on a few select/custom templates).