In part numbers that are color specific, the 7th and 8th value in the part number will always represent the last two values of the paint code.
Maximum steel metallic paint code is PAR. The handle part number for it would be 7KJ40KARAA. The “K” is irrelevant, only the “AR” matters.
Also, be careful when selecting tailgate handles because there are 4 different part numbers for each color. There’s full body color and body color with chrome. Then for each of those, the camera hole is either specific to the regular backup camera, or the backup camera for the surround view system.