Besides purples and greens (which totally bring out my brown eyes too) I love golds and silvery grays! I find that silvery (like pewter, even metallic blues) colors work really well with brown eyes rather than whites/frosts, and gold colors totally bring out the warmth of my eyes as well. Whenever I wear golds, my eyes stand out so much while still keeping them warm, and it slides as a neutral look even though they're really shimmery! Also, I fine using dark brown liners instead of blacks work really well too. HTH!