ΔE 13.3, fair: the same colour family, but not a straight swap. Deck Tan is much more muted, warmer than Morghast Bone.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Deck Tan is much more muted, warmer than Morghast Bone.
The same difference applies the other way round: Morghast Bone is much more saturated, cooler.
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 Morghast Bone on the colour wheel See Deck Tan on the colour wheel
All matches: Morghast Bone equivalents · Deck Tan equivalents