We have released new skin colors to our Generic Skin. You can change the skin of your hotspot splash page in the Control Center by clicking Manage > Locations, then click on hotspot name, then Modify Hotspot Data > Splash Page settings. You will find the Skin selector there. More specific skin options will be available soon, for example for cafes, hotels, campgrounds, etc. so stay tuned.
See skin previews here: http://www.hotspotsystem.com/customer/skinpreview/