Leviathan Light vs Ulthuan Grey

How close are they?

ΔE 14.7, fair: the same colour family, but not a straight swap. Ulthuan Grey is a little darker, more muted than Leviathan Light.

Can I use Ulthuan Grey instead of Leviathan Light?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Ulthuan Grey is a little darker, more muted than Leviathan Light.

Can I use Leviathan Light instead of Ulthuan Grey?

The same difference applies the other way round: Leviathan Light 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.