Ruinous Spell vs Arachnid Green

How close are they?

ΔE 13.1, fair: the same colour family, but not a straight swap. Arachnid Green is a little darker, more muted, cooler than Ruinous Spell.

Can I use Arachnid Green instead of Ruinous Spell?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Arachnid Green is a little darker, more muted, cooler than Ruinous Spell.

Can I use Ruinous Spell instead of Arachnid Green?

The same difference applies the other way round: Ruinous Spell is a little lighter, more saturated, warmer.

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.