I would go a little crazy with the logo. It's a bit too simple and has nothing to entice you. Otherwise you have some pleasant colours, nice design. Looking forward to seeing it progress, you're surely on the right track.
Thanks for your comments! Colour palette is the basic one, there will be surely more (only standard parameters used in the style). Logo is not in the screenshot, as the footer and some other parts (still under development).
Yes, it quite looks as default but its really hard to escape that look when doing such themes, so I do my best to refresh the appearance of XenForo.