My '66 Newport is "Spinnaker White". The Ford "white" is more creamy in color, with GM "white" being a "blue white", by comparison. You don't notice these significant variations unless you put them all side by side, as I did in the middle '70s.
Almost all of the OEM-style touch-up paint comes from Dupli-Color, even if it has OEM packaging from the dealer. So that might be a better source.
If you go to a paint supply store and get them to mix you some, their minimum mix quantity usually is a quart.
As I'm evolving my knowledge of Chrysler paint codes, I believe the "W1" is the basic color code with the "E" being model year-specific, for whatever reason that Chrysler did that? Or might it have been a "vendor code" of where that particular paint was sourced for the assembly plants? The "number" in the code would relate to the "darkness" of the color, as the particular color families (blues, greens, reds, etc.) graphically indicate.
Many like to use the "sales name" for the color, but as with the "high impact" colors . . . same color code, different sales name for the car divisions. Similar things existed at GM, too. So, codes are best.
If I'm incorrect in my observations, please advise.
CBODY67