ΔE 10.7, fair: the same colour family, but not a straight swap. IJN Gray (Kure Arsenal) is more saturated than Dawnstone.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). IJN Gray (Kure Arsenal) is more saturated than Dawnstone.
The same difference applies the other way round: Dawnstone is more muted.
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 Dawnstone on the colour wheel See IJN Gray (Kure Arsenal) on the colour wheel
All matches: Dawnstone equivalents · IJN Gray (Kure Arsenal) equivalents