wabi
You missed one
Gray for stainless and its a bit thicker than White.
TT50 260SS GRAY STAINLESS STEEL TEFLON-THREAD SEAL TAPE
This tape has nickel pigment color added for use on all stainless steel fittings. Prevents galling, seizing or corrosion. A high density rating, this is the tape for coarse stainless steel threads. Also carries a temperature range of -450F to +550F. Exceeds Mil. Spec. T-27730A. UL Listed