ΔE 9.5, close: similar, with a visible difference side by side. Dawnstone is a little darker than Aggressor Grey FS 36251.
Usually, if you are not matching paint already on the model. Close match (ΔE 10). Dawnstone is a little darker than Aggressor Grey FS 36251.
The same difference applies the other way round: Aggressor Grey FS 36251 is a little lighter.
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 Aggressor Grey FS 36251 on the colour wheel See Dawnstone on the colour wheel
All matches: Aggressor Grey FS 36251 equivalents · Dawnstone equivalents