ΔE 10.7, fair: the same colour family, but not a straight swap. Grey Seer is a little lighter than Light Grey Shadow.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Grey Seer is a little lighter than Light Grey Shadow.
The same difference applies the other way round: Light Grey Shadow is a little darker.
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 Light Grey Shadow on the colour wheel See Grey Seer on the colour wheel
All matches: Light Grey Shadow equivalents · Grey Seer equivalents