Majestic Fortress vs Viridian Green

How close are they?

ΔE 13.7, fair: the same colour family, but not a straight swap. Viridian Green is noticeably lighter, cooler than Majestic Fortress.

Can I use Viridian Green instead of Majestic Fortress?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Viridian Green is noticeably lighter, cooler than Majestic Fortress.

Can I use Majestic Fortress instead of Viridian Green?

The same difference applies the other way round: Majestic Fortress is noticeably darker, 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.