ΔE 6.5, close: similar, with a visible difference side by side. Tan Earth is warmer than MERDC Sand (FS30277).
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Tan Earth is warmer than MERDC Sand (FS30277).
The same difference applies the other way round: MERDC Sand (FS30277) is 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 MERDC Sand (FS30277) on the colour wheel See Tan Earth on the colour wheel
All matches: MERDC Sand (FS30277) equivalents · Tan Earth equivalents