Brown is a color that seemed to fall out of favor in the worlds of fashion and decor starting in the eighties. But now it has a very modern appeal, while still being somewhat retro. Weather you are going for a certain look, or you just want your valance to match another brown component of your decor, you should be able to find something appropriate. Remember that the rod the valance will be hanging on should match the style you are going for.
I love the shiny stripes on this model:
Brown grommet valance pictured: Stylemaster Fiesta Faux Silk Grommet Valance with Sequin Organza Espresso, 56-Inch by 18-Inch