Autumn Sage vs Light Gray

How close are they?

ΔE 11.3, fair: the same colour family, but not a straight swap. Light Gray is more muted, cooler than Autumn Sage.

Can I use Light Gray instead of Autumn Sage?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Light Gray is more muted, cooler than Autumn Sage.

Can I use Autumn Sage instead of Light Gray?

The same difference applies the other way round: Autumn Sage is more saturated, warmer.

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.