Hi, I registered an account here just to share what info I have about this colour, for the sake of future Googlers.
It's my favourite car colour in the world. I wanted it many years ago for a custom build and it took weeks for me to dig out the necessary info. I hope this information will be useful to some of you.
The colour is called Lamborghini Monterey Blu or Blu Nethus (same thing). It was a special colour specifically commissioned by the Monterey Lambo dealership in the 90s (along with a beautiful candy red colour whose name escapes me).
The base coat is a light lilac metallic colour. Here is the photo my paint shop took when testing:
It is then topped with a translucent dark blue clear coat, creating a gorgeous candy effect. Like all candy paints, it requires a proficient and even painter, and is near impossible to touch-up if damaged.
The colour code is PPG 0031, but this is a Lambo code, and doesn't help anyone. However, I tracked down one PPG shop who had the base formula in their database, and well, here is the golden ticket (I have NEVER seen this info online anywhere!):
The system in use is PPG Deltron. Numbers given are relative proportions.
BASE COAT
D953 > 859.9
D981 > 66.9
D759 > 28.7
COLOURED CLEAR COAT
D895 > 744.7
D776 > 74.3
D754 > 46.4
D741 > 44.6
D759 > 18.6
With the above, anyone with the PPG base paints should be able to mix the colour for you.
Good luck!