Just got off the phone with Gary Richards regarding your question. The simple answer is that they are not the same color and in fact Gary says the hubcap color isn’t actually red but something more toward burgundy but not that dark. He also said the color is translucent so that you can see through it slightly. He suggested trying a hobby shop spray paint selection. The problem with using translucent paint is that if you scuff the hubcap so that the paint will stick the scuff marks will show up through the paint. If you don’t scuff the hubcap the paint won’t stick and will come off with the spray from a hose.
I used a color that you can get at most auto parts stores in a spray can. I used a GM color called Garnet. If it gets down to whether you have the actual “correct” color in your wheel covers, offer the judge a beer, which will probably have more influence than anything anyone else can say. The factory never published a paint formula for the part. After getting close to 60 years, even NOS ones will no longer be “right”.