Tamiya's Haze Gray is much more like the wartime color.
You might want the XF 20 from Tamiya, instead.
The Federal Standard number is FS 26270, in Model Master that's laeled "Neutral Gray."
This chart might be helpful: https://hobbylandbg.com/colourtable
Note that USN decks are dark--in Modelmaster, Gunship Gray is a go-to (flight deck surfaces are darker still, near NATO Black when new).