Reader Lauren was nice enough to make some comparison photos of Angel Blue and Aquamarine. Angel Blue is on top and the Aquamarine is on the bottom.
In this photo, the top left color is Angel Blue, the bottom left is Toothpaste and the vertical strip on the right is Aquamarine. I need to dig up some Aruba and head down to the store to compare Aquamarine to Aruba. I think I have a bra that has Sea Spray in it, too, so I'll try to remember to bring it with me when I go to the store this week.