If you would like to enhance your brown eyes with a nude look why not try a plum mauve eye shadow?
17 wild Metallics Eyes cream eyeshadow in Wild Nude (a slightly shimmery pale mauve) from Boots as a base.
Both shades of Nars duo eye shadow in Charade (matte smoky plum/muted mauve) up to the crease.
ByTerry Crayon Khol Terrybly in 2-Brown Stellar smudged along the lash line.
One coat of Make Up Forever Smoky Lash mascara in Extra Black.
In my opinion these shades look beautiful not only on brown eyes but also green and blue eyes as well.