Here are some pictures I took last night of my Spigen Ultra Fit and Slim Armor cases in the mint color. They aren't the best pictures, but they will do.
Ultra Fit:
Slim Armor:
I was really unsure about the mint color when I ordered it, but now that I see it I am really fond of it. It is a really nice mint color and isn't too 'Tiffany Blue' bright.
As far as the cases go, I really like the Ultra Fit because you can see the mint from the front view of the phone. There is a small lip the keeps the screen from getting scratched if you put it face down, and a bit of a lip behind the charging jack to give the bottom a little more protection.
The Slim Armor fits around the entire device and provides more protection. It fits perfectly and provides more of a lip for the screen. The only downside for me personally is that I can only see the mint from the sides/back.