ΔE 12.7, fair: the same colour family, but not a straight swap. Light Green Grey is a little darker, more saturated than Sky Grey.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Light Green Grey is a little darker, more saturated than Sky Grey.
The same difference applies the other way round: Sky Grey is a little lighter, 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 Sky Grey on the colour wheel See Light Green Grey on the colour wheel
All matches: Sky Grey equivalents · Light Green Grey equivalents