Is this a question or simply an observation of how much misinformation can be gathered on the Internet?
If it is a question, I'll respond.
There is one way to spell the color name correctly; Folkestone Gray.
And, at least in 1939 and 1940, there was one color associated with Folkestone Gray. While there were most likely slight variations between plants, the color was certainly intended to match.
I have attached two photos of the same car painted Folkestone Gray. One is within my shop, artificial light and appears to me a bit gray. The other is pulled out of the shop in natural sunlight and appears a bit tan.
Most of us see colors differently from one another but this example should allow a decent glimpse as to what Folkestone Gray was meant to be in '39 / '40.
I do a lot of research prior to restoring a car. Getting the correct shade requires just that.
Paint charts, even well-preserved charts, are often darkened with age.
Modern "formula equivalents" have proven to be fairly accurate to not even close.
