I checked this site:
Audi A1 ? Paint Colours ? Audi.co.uk
The Scuba Blue is close. But there are variables to consider. Colour-palette used on the Audi website to indicate colour vs. real-life colour. Same to consider for the photographer of the A1 in the photos you posted above.
My personal advice would be to head down to a dealership and ask the sales people. With any luck you may even be able to see a car with a Scuba Blue paintjob. Maybe not an A1 but at least it would give you an idea. Good luck.