Read the following tutorial and learn how you can customize main colors in Sliced Plone theme.
The Sliced Plone Theme design has two main colors that can be freely changed to suit your design or company colors.
Make sure that plone.app.theming is installed and activated (via Site Setup -> Add-ons). Go to the Theming settings in SIte Setup and select “Advanced settings” tab. In “Parameter expressions” find “first_color” and “secondary_color” lines and insert color values you would like your website to feature (e.g. string#055cc8). This will change color of text, headers, links, hovering, and other design elements.
