ΔE 7.1, close: similar, with a visible difference side by side. Sand Beige is more muted, warmer than Tombstone Yellow.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Sand Beige is more muted, warmer than Tombstone Yellow.
The same difference applies the other way round: Tombstone Yellow is 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 Tombstone Yellow on the colour wheel See Sand Beige on the colour wheel
All matches: Tombstone Yellow equivalents · Sand Beige equivalents