Somewhere on the seats is a tag with the name of the manufacturer. It may also tell you the color. Contact the manufacturer and see if they can provide the color.
Tony & Ruth........... FMCA#F416727
2016 London Aire 4519, Freightliner chassis, Cummins ISX, 2018 Jeep Wrangler Unlimited, Blue Ox Avail with AF1. TST 507 TPMS