Mephiston Red vs Red FS11136

How close are they?

ΔE 7.0, close: similar, with a visible difference side by side. Red FS11136 is more muted than Mephiston Red.

Can I use Red FS11136 instead of Mephiston Red?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Red FS11136 is more muted than Mephiston Red.

Can I use Mephiston Red instead of Red FS11136?

The same difference applies the other way round: Mephiston Red is 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.