You can follow below instruction to configure color of the site.
Global Color Palette – You can create your own preferred color palette for your website.
Base Font Color – Select a color for all the general site text.
Link Color – Select a color for all the links on the site and also select a color for the hover effect.
Heading Color – Select a color for all the site headings.
Text Selection Color – Select the text color and background color to apply to a selected text.
Border Color – Select a color for all the borders used on the site.
Section Background Color – Use this color in some specific background settings in the theme.
Site Background – Select a background color to apply for the entire site.