Terrestrial Titan vs Blue Mountain

How close are they?

ΔE 13.1, fair: the same colour family, but not a straight swap. Blue Mountain is noticeably lighter, cooler than Terrestrial Titan.

Can I use Blue Mountain instead of Terrestrial Titan?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Blue Mountain is noticeably lighter, cooler than Terrestrial Titan.

Can I use Terrestrial Titan instead of Blue Mountain?

The same difference applies the other way round: Terrestrial Titan 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.