Raging Rose vs Sekigahara

How close are they?

ΔE 8.7, close: similar, with a visible difference side by side. Sekigahara is a little darker, more muted than Raging Rose.

Can I use Sekigahara instead of Raging Rose?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Sekigahara is a little darker, more muted than Raging Rose.

Can I use Raging Rose instead of Sekigahara?

The same difference applies the other way round: Raging Rose 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.