Updating Primary and Background Colors in Relume's Style Guide

Hey there kind internet pals, I'm looking to make global changes to the primary colors and background colors in the style guide on a site that uses the Untitled UI components library in Relume. When I navigate to the styleguide page and select the background primary swatches, they only show the class 'medium-padding' and I can't find in the style panel where the color is coming from in order to change it. Here's the read-only link of my webflow site: https://preview.webflow.com/preview/sellstory2?utm_medium=preview_link&utm_source=designer&utm_content=sellstory2&preview=6e9ea4b2000c4d81a59c6ddcf1cf5da1&pageId=6678812a0ff5fe25a70d1691&workflow=preview