ΔE 12.4, fair: the same colour family, but not a straight swap. Dawnstone is a little lighter, more muted than Grey Shadow.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Dawnstone is a little lighter, more muted than Grey Shadow.
The same difference applies the other way round: Grey Shadow 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 Grey Shadow on the colour wheel See Dawnstone on the colour wheel
All matches: Grey Shadow equivalents · Dawnstone equivalents