I have chosen a theme and a style, but how can I change the default colors?
NationBuilder makes it easy to change your theme's color palette.
The first step is to create a custom theme. While it's possible to create your custom theme from scratch, we recommend cloning an official theme and style variation that's closest to what you're going for, and then modify it to your liking. There more information on how to create a custom theme here. Once you've created your custom theme, you'll be ready to start making changes to the colors.
Go to Websites > Theme > theme.scss to open up your theme's style sheet. Once there you will see a list of theme colors. Each theme color corresponds to an element on the website.
In the example above, I changed the theme_color_1 to #000000 (black), clicked "save & publish," and that changed the colors of my header background and buttons. You can make changes for all of the colors on your website in this way. Enjoy!