Offwhite vs Spaceship Exterior

How close are they?

ΔE 8.0, close: similar, with a visible difference side by side. Spaceship Exterior is a little darker, more muted than Offwhite.

Can I use Spaceship Exterior instead of Offwhite?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Spaceship Exterior is a little darker, more muted than Offwhite.

Can I use Offwhite instead of Spaceship Exterior?

The same difference applies the other way round: Offwhite is a little lighter, more saturated.

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.