Terrestrial Titan vs Twilight Blue

How close are they?

ΔE 11.5, fair: the same colour family, but not a straight swap. Twilight Blue is a little lighter, cooler than Terrestrial Titan.

Can I use Twilight Blue instead of Terrestrial Titan?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Twilight Blue is a little lighter, cooler than Terrestrial Titan.

Can I use Terrestrial Titan instead of Twilight Blue?

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