im am not sure what you are talking about. i know of 2 processes to get a 'pearl' paint. i am sure there are more.
1. fine metallic flakes added to the paint and clear coat- a 2 paint process. of course you can add more flakes, but the more you add the more it looks mike a bumper car at the fair. i dont see how you could get a black pearl this way, unless the base coat blue was rather light.
2. is called a tri- coat pearl: base paint, an iradescent paint (not metallic flakes by Dupont), and a clear coat. when you see a car that appears to changes color depending on how you view it, it is using this process. now the iradescent works with light to cause this color change, and seeing how black absorbs light, the only way you could get the car you are describing using this process would be to have a car with a BLACK base paint and a blue iradescent coat.
id love to see a car the color you talk about.