Dunes Dunes is a smart sandy style, that will work well on a wide range of WordPress themes, due to its smart colors and crisp detailing.
Crawford Crawford is a sophisticated brownish style with beautiful rounded corners and the ability to blend in beautifully with mostly brown themes. This style will also work well with many white or very minimalistic themes.
Blue Steel Blue Steel is a subtle, clean style for your forms. Not only is this style really, really ridiculously good looking, it will fit with many lighter colored themes.