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The Elegant Bootstrap theme is a simple, yet beautiful and professional white, grey and black Twitter Bootstrap theme. It is designed for businesses; particularly, high-end, luxury and art businesses. Only the body and navbar Bootstrap elements are touched, but I have provided an additional CSS file that will make the Bootstrap elements gradient.
You can also use a body background image, of shaded greys, to add texture and grey shading to the background.
As with all other Bootstrap themes of mine, the Elegant Bootstrap Theme is based upon my Skeleton Bootstrap Theme, so updating to the latest Twitter Bootstrap version is quick and easy.