Dark Reaper vs Rlyeh Grey

How close are they?

ΔE 10.2, fair: the same colour family, but not a straight swap. Rlyeh Grey is a little lighter, more muted than Dark Reaper.

Can I use Rlyeh Grey instead of Dark Reaper?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Rlyeh Grey is a little lighter, more muted than Dark Reaper.

Can I use Dark Reaper instead of Rlyeh Grey?

The same difference applies the other way round: Dark Reaper is a little darker, 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.