A few minutes ago Caliburn 3.1.0 was released on Elevenfour's package server. It's not possible to update from a previously installed Beta or RC version of this style. Instead you have to uninstall the old version and then install the latest version This is due to the lack of being able to update the color palette of the style which was necessary to finalize the style.
Caliburn is a bright style with purple color accents. The style is available for WoltLab Suite 3.1 only. There will not be a version for WoltLab Suite 3.0.
You will get more information and screenshots visiting the Caliburn information page.