You and I cannot explain the textual name for "FS36270" at https://www.e-paint.co.uk/Lab_values.asp (a site that I introduced to this board) but check the sRGB data: 133; 138; 141. "141" reveals the bias toward blue. All USN WW2 neutral grays, #27 neutral haze gray among them, were specific blends of lampblack and white only. The blue bias eliminates the cited FS36270, if e-paint has it right, as representative of any neutral gray.
I question whether e-paint has identified FS36270 correctly. I matched Testors FS36270 postwar haze gray with Pantone uncoated Cool Gray 8U, sRGB: 147; 149; 152, Light Reflectance Value "Approx. 30", which is lighter than 27 for #27 neutral haze gray and even lighter yet than LRV 25 cited (incorrectly?) for "FS36270" at e-paint. You can always get paints and use your own eyes.
Early-WW2 5-H, as represented by Testors 4238, reasonably matches Pantone Coated 2162C, sRGB: 158; 165; 180, LRV ~37. LRV 37 is applicable too to #37 neutral light gray. The darker shades of late-war USN ships in camouflage measure 22, which specified haze gray above the lowest point of the hull sheer line, are consistent with #27 neutral gray instead of early-war 5-H.
The bottom lines for any modeler and for any paint supplier:
- Actual observation and the attributes of #27 neutral gray and Colourcoats US28 substantiate that this paint is accurate for the late-WW2 USN Measure 22.
- Postwar haze gray (e.g., the S-S USN 2 chip, Testors 4757, Colourcoats M03 (M=modern=postwar, not WW2)) is visually distinctly different (lighter in shade, and blue-shifted) from #27 neutral haze gray, not the same, and anyway was not a WW2 color for the USN.
This photograph illustrates USS PCE 870 in 1949 during re-painting to a lighter shade than her wartime paint (the small pennant number was a wartime legacy), and is consistent with postwar haze gray (LRV ~30) replacing wartime #27 neutral haze gray long after WW2: