There should be a paint code on the VIN plate (or whatever it's called - I mean the riveted-on plate on the bonnet slam panel near the latch mechanism), try feeding that into Google. There is a site out there with the paint codes but I can't remember the address, typing the code along with something like "Land Rover paint" into Google should dig it up.
Worked for mine, which turned out to be "Avalon Blue Mica"! :lol:
