1959 Bedside stainless insert color

[Foot Stomper]

Hey guys, I'm confident that the bedside stainless trucks had a red color between the vertical bars at the back end (near tail light). What I'm trying to determine is what it reflective originally or was it simply painted red...and if so, what color code?

I'm not concerned about the spear color at all.

Any help or advice and/or pictures would be much appreciated.

Picture here is for reference only as it is not my truck.