When I log in to Amex online and choose "Explore card benefits" it shows a green card, even though at the main account screen my white Amex Unicorn card still shows up. I know they are not handing out any more Unicorn's... I hope that doesn't mean it is going to change to green. Although that wouldn't be the end of the world as long as they don't up the AF.
Maybe just a glitch... My Zync still looks white on their website