Terrestrial Titan vs Greatcoat Grey

How close are they?

ΔE 14.4, fair: the same colour family, but not a straight swap. Greatcoat Grey is noticeably lighter, more muted, cooler than Terrestrial Titan.

Can I use Greatcoat Grey instead of Terrestrial Titan?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Greatcoat Grey is noticeably lighter, more muted, cooler than Terrestrial Titan.

Can I use Terrestrial Titan instead of Greatcoat Grey?

The same difference applies the other way round: Terrestrial Titan is noticeably darker, more saturated, 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.