ΔE 11.2, fair: the same colour family, but not a straight swap. Bright Warm Grey is a little lighter, more muted than Tomb King Tan.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Bright Warm Grey is a little lighter, more muted than Tomb King Tan.
The same difference applies the other way round: Tomb King Tan is a little darker, more saturated.
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 Tomb King Tan on the colour wheel See Bright Warm Grey on the colour wheel
All matches: Tomb King Tan equivalents · Bright Warm Grey equivalents