Unless the truck has been painted that darker blue, I believe
the original color that was on it was the correct mariner blue,
not the powder puff blue of the sample you show.
Don't know if your shooting for an original restoration or not
Dave but your close.
The black is correct cept for the CHEVROLET lettering, which was
not painted and the bumper, which on a '50 commercial would
have been chrome. Also the bed wood would have been painted
black also.
And of course I'm sure your aware that the interior wasn't
originally white.
Denny G