Dark Elf Highlight vs Sombre Grey

How close are they?

ΔE 12.6, fair: the same colour family, but not a straight swap. Sombre Grey is a little lighter, more saturated than Dark Elf Highlight.

Can I use Sombre Grey instead of Dark Elf Highlight?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Sombre Grey is a little lighter, more saturated than Dark Elf Highlight.

Can I use Dark Elf Highlight instead of Sombre Grey?

The same difference applies the other way round: Dark Elf Highlight is a little darker, more muted.

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.