Matt White vs Trooper White

How close are they?

ΔE 8.9, close: similar, with a visible difference side by side. Trooper White is a little darker, more saturated than Matt White.

Can I use Trooper White instead of Matt White?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Trooper White is a little darker, more saturated than Matt White.

Can I use Matt White instead of Trooper White?

The same difference applies the other way round: Matt White is a little lighter, more muted.

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.