We use Snap for the site theme and give instructors the option of using Boost for their course theme. Have tried several Boost presets, including the "Color Function Preset for Boost Moodle Theme." The color will sometimes change, but immediately changes back to the default blue color after navigating within the course. The color we are trying to get is #af0f37 and I have set it as the Brand/accent color in Boost. The Boost course theme is mostly ignoring the setting.