1951 Elmer,
Note: scanned images of 50 year old chip colors displayed on a PC screen are no indication of true color - use these only for comparing light and dark blue. The greens are terrible on the scans below and the dark colors are hard to distinguish. At least, you will find both Ditzler/PPG and Dupont codes on the scans below.
Here is a link to an orginal Dupont paint chip for
\'51/\'52 Windsor Blue. Windsor Blue is the lighter of the two blues used in 1951/52 Chevrolet trucks. Also note that the
1951/52 Mariner Blue (a very dark, navy-type blue) is a name given to two different colors used between 1947-1955.
Here is another sheet of chips - for comparison purpose
(PPG/Ditzler 1951-54). Tim