Complex Types
Background

Gives you the options availible to the css entity
background. It seems no validation this time either. And writing a validation script would be tricky or maybe impossible (?)
background:{vb:styelvar your_background};
Font

Suitable for the
font css entity. No validation.
font:{vb:stylevar your_font};
Text Decoration

For the
text-decoration entity. Uses a collection of Yes/No radio buttons for each of the availible options. One a bit strange thing is that you can select None at the same time as all the other options, but if you do the none overrides the other so all is well
text-decoration:{vb:stylevar your_textdecoration};
Dimension

Obviously used for things with a width and a height. Two textfields and one Popup for units.
width:{vb:stylevar your_dimension.width};
height:{vb:stylevar your_dimension.height};
Border

For the
border entity.
border:{vb:stylevar your_border};
Padding

For the
padding entity. The "Use the 'top' value for all sides" option is useful.
padding:{vb:stylevar your_padding};
Margin

Really the same as the Padding type. Css-wise they are the same, so the only reason would be for the user to know what they are entering info for, but since there is no label in this version of vBulletin it is redundant this far. (but since it is set in the database it might show up in future versions of vBulletin, so you better stick to the right type)
margin:{vb:stylevar your_margin};