Sapphire Blue vs Fenrisian Grey

How close are they?

ΔE 12.6, fair: the same colour family, but not a straight swap. Fenrisian Grey is noticeably darker, more muted, cooler than Sapphire Blue.

Can I use Fenrisian Grey instead of Sapphire Blue?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Fenrisian Grey is noticeably darker, more muted, cooler than Sapphire Blue.

Can I use Sapphire Blue instead of Fenrisian Grey?

The same difference applies the other way round: Sapphire Blue is noticeably 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.