Skin builder options on all skins

Hi,

Skin builder does not offer customization for Terrace skin as it alerts “Selected scheme doesn’t have any options to configure”. Can this be improved ?

Terrace them uses shades of black, so it have not many color element to configure.
Also, skin is mostly transparent, so you can define the custom background for body tag, as result all white-spacing area will have the same color as body background.