I see this as a '70 Dodge color. Were Swingers available in this color? I don't think I can bring myself to paint my car its original FY1 top banana and I'm trying to stick to a factory color. FE5 Rallye red is the other choice.
I haven't been able to find any pics of a Dart in that color so you may be right.Doesn't look like R6 was available in 1970 Darts. Not sure if it was available in any 1970 vehicle. FE5 replaced it.
I think the aftermarket paint company chip charts aren't super accurate on applications.