I just ran across this "Aqua Marine Blue" S5 listed on the UK Audi used car site. It's from a dealership in Stafford.
I assume this is a custom color, as I don't see this particular color listed in the UK brochure that I have nor is the color available on the UK S5 configurator.
I'm wondering if this is the same color known as "Liquid Blue Metallic" (Liquidblau Metallic) available on the A5 in other countries like Germany and Czech Republic.
For reference, the last pic (albeit very small) is an A3 in Liquid Blue that I had found a while back on mobile.de. To me the A3 looks like the same color as that S5.
No matter what you call it, I think it would look better with my wife behind the wheel than me. It does look great, but not aggressive enough for me. And yes, I did come to this conclusion before noting the name given to the color. But, after seeing the interior pics, I am very happy that my soon to be received S5 has the graphite inserts (damn they look good to me). Thanks for posting the pic TX