One eye goes blue to greenish blue to green, other does the opposite. And if you look closely they sparkle. Very neat and completly unique! Made to work with the standard avatar head. I have been able to get them to work with the proportional head as well but cannot guarantee that it will for you. I RECOMMEND you buy the empty eyes by iamTHEmoose http://www.imvu.com/catalog/product_info.php?products_id=180519 otherwise you may see the default eyes when you look in certain directions.