[Baron Von Zeppelin]

I painted cars for a long time.
Began by mixing auto paints at a Dupont and SherWill jobber.
Every shop I've worked at - away from home - we had our own mixing systems.

Have seen so many changes since the early 80's there is no way I would expect any company to have a formula that would accurately reproduce a 1958 color.
Those tints are long gone and formulas superseded and improvised.

If you have any area of original color left on the car , get matched to that.

If you pick a modern color that mimmicks it closely on a chart ,
a point of awareness is if you do 5 spray outs from 5 different brands you will get 3-5 different shades of what were all supposedly the same color for the same car/manufacturer.

The sure bet is to use the Sikkens color map , but then you are practically married to buying high end color.
They have an economy line called Lesonal they can most times mix the formula in , but see above about the 3-5 shades.

If you have to have econo color , start with small quantity -- if it looks "right , on the mixing stick" -- then do a spray out with letdowns using 3 different air pressures.
Then clear coat the sample and investigate.

The color on it now looks okay indoors , but not so good outdoors.