ΔE 14.7, fair: the same colour family, but not a straight swap. Deathclaw Brown is a little darker, much more muted, cooler than Warm Yellow.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Deathclaw Brown is a little darker, much more muted, cooler than Warm Yellow.
The same difference applies the other way round: Warm Yellow is a little lighter, much more saturated, 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 Warm Yellow on the colour wheel See Deathclaw Brown on the colour wheel
All matches: Warm Yellow equivalents · Deathclaw Brown equivalents