ΔE 8.2, close: similar, with a visible difference side by side. Screaming Skull is a little lighter, cooler than Skeleton Bone.
✓ Herrick Games paint comparison chart lists these two as equivalents.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Screaming Skull is a little lighter, cooler than Skeleton Bone.
The same difference applies the other way round: Skeleton Bone is a little darker, 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.
See Skeleton Bone on the colour wheel See Screaming Skull on the colour wheel
All matches: Skeleton Bone equivalents · Screaming Skull equivalents