ΔE 14.3, fair: the same colour family, but not a straight swap. Castellax Bronze is a little darker, more muted, warmer than Tainted Gold.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Castellax Bronze is a little darker, more muted, warmer than Tainted Gold.
The same difference applies the other way round: Tainted Gold is a little lighter, 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 Tainted Gold on the colour wheel See Castellax Bronze on the colour wheel
All matches: Tainted Gold equivalents · Castellax Bronze equivalents