Code PDR or 184, Machine Grey Pearl is an interesting formula. It's mostly clear, then a good amount of a course metallic, and the pearl is mostly silver, with a bit of fine violet. It also has a good amount of Oceanic Blue and Brilliant Red tint, along with 2 whites (bright white and frost white).

It's unusual for a silver or gray in that most of them are mostly all metallic (with no clear), and they tend to only have trace amounts of blue, red, yellow, green, whatever in them.