Bastion Grey vs Interior Green

How close are they?

ΔE 12.6, fair: the same colour family, but not a straight swap. Interior Green is noticeably darker, warmer than Bastion Grey.

Can I use Interior Green instead of Bastion Grey?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Interior Green is noticeably darker, warmer than Bastion Grey.

Can I use Bastion Grey instead of Interior Green?

The same difference applies the other way round: Bastion Grey is noticeably lighter, cooler.

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.