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Dark Blue Metallic from the Porsche Cayman. It is a very deep blue, looks more adult and refined, at night, it is almost black.
Yes!
This was going to be my first suggestion yesterday.
Nachblau Pearl
Which I love, but can have a hint of Purplish or Greenish (well, pearl...), but honestly usually looks black to blue where I live (overcast).
Nachblau Metallic might be a more straight forward shade of this same color. But if you are going for a really $ paint job I wouldn't muddle the depth with any metallic.
Mazda's Deep Crystal Blue Mica is good too... it's a dark blue metallic that isn't navy and doesn't go too purplish either. Really hard to photograph, though. Either Mazda has been changing the paint's color between the years or they have been adjusting their photos and lighting: