How do i find the correct color code for the carpet (which i want to replace) inside my 1965 Cadillac deVille Convertible, it has Blue Leather Seats, and the carpet color what looks like - either, Light Blue or Turquoise or Aqua carpet on the floor and on the door panels, how do i determine what color to order, i cant physically get to a supplier as I'm in Australia, and all parts suppliers for these cars are in the US.

I've attached a photo of the plate under the hood, maybe that will help someone that knows?

Thank you for any help....