Hastur Purple vs Brown RLM26

How close are they?

ΔE 14.0, fair: the same colour family, but not a straight swap. Brown RLM26 is a little lighter, more muted, warmer than Hastur Purple.

Can I use Brown RLM26 instead of Hastur Purple?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Brown RLM26 is a little lighter, more muted, warmer than Hastur Purple.

Can I use Hastur Purple instead of Brown RLM26?

The same difference applies the other way round: Hastur Purple is a little darker, more saturated, cooler.

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.