ΔE 10.3, fair: the same colour family, but not a straight swap. A-14 Steel Grey is a little lighter than Graphite Gray.
Can I use A-14 Steel Grey instead of Graphite Gray?
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). A-14 Steel Grey is a little lighter than Graphite Gray.
Can I use Graphite Gray instead of A-14 Steel Grey?
The same difference applies the other way round: Graphite Gray 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.