First off, Welcome
Now if I am correct, the aircraft may have been painted overall gloss sea blue. The color would have been listed as A/N 623. The A/N paint coding was droped shortly after the war ended I believe. The Federal Standard system, FS 595b, is now recognized as the way to match a military color. The blue is listed as Fs 15042.
Several brands of model paints will contain the gloss sea blue you are looking for. You can use one to either create a paint chip to have enough made to cover the panel. Or purchase a number of containers to make enough to paint the panel. Problem though. Each brand will call the paint the same color and have the same Fs 595b number, but will end up being different shades.
If you so desire to, you could purchase a complete color chip set of the FS 595b colors and have the match made that way.
If the plane was another color(s), and I don't presume anything, some colors may be a bit harder to match.
Hope this is a good start.
Drew