Mystic White vs Chainmail

How close are they?

ΔE 11.8, fair: the same colour family, but not a straight swap. Chainmail is noticeably darker than Mystic White.

Can I use Chainmail instead of Mystic White?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Chainmail is noticeably darker than Mystic White.

Can I use Mystic White instead of Chainmail?

The same difference applies the other way round: Mystic White is noticeably lighter.

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.