Skeleton Bone vs Trollblood Highlight

How close are they?

ΔE 6.8, close: similar, with a visible difference side by side. Trollblood Highlight is a little darker, more muted, cooler than Skeleton Bone.

Can I use Trollblood Highlight instead of Skeleton Bone?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Trollblood Highlight is a little darker, more muted, cooler than Skeleton Bone.

Can I use Skeleton Bone instead of Trollblood Highlight?

The same difference applies the other way round: Skeleton Bone 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.