ΔE 6.5, close: similar, with a visible difference side by side. Liquid Mask is a little lighter, more muted than Insignia White (US Navy).
Usually, if you are not matching paint already on the model. Close match (ΔE 6). Liquid Mask is a little lighter, more muted than Insignia White (US Navy).
The same difference applies the other way round: Insignia White (US Navy) is a little darker, more saturated.
ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See Insignia White (US Navy) on the colour wheel See Liquid Mask on the colour wheel
All matches: Insignia White (US Navy) equivalents · Liquid Mask equivalents