John, the OE was Yellow Cadmium plating, but it looks very close to what you have done. Nice job!
BTW - Mark W. at Mikey914/914Rubber.com (member vendor on here) sells white Delron seats (in black too) if your OEM nylon one breaks, which looks about the same color-wise, but will last longer. Ditto for the rear trunk rollers in Delron.