New module is available at ColorizeIt: module for parsing XenForo styles. Variation of default style is available for editing here. It is not exact copy of XenForo's default style, XML file includes only templates that have color values. To install it you need to have original default style. Install downloaded style as a child style of default style. Why XenForo? XenForo already has color switcher in admin control panel, but it changes only css entries, not images. ColorizeIt changes images and style.