And, never assume that a 50+ year old color chip sheet is really what it looked like 50+ years ago (unless it has been carefully stored over all those years).
The best color chips I have found have been in hardly used, original, Truck Data Books, but I still would not bet that the colors are true.
Nonetheless, if you have a 1949 Chevrolet standard-cab and color truck with original paint, you should be able to tell the lighter blue (Windsor) from the darker blue (Mariner) and the lighter green (Seacrest) from the darker green (Forester).
Once you chosen that color and have paint mixed to match it (from a color match of a protected part, such as a protected place in the engine compartment; or, you use an old code/formula from a chip sheet; or, you use an offset modern formula), no one knows how "true" the resultant color is.
