ΔE 12.9, fair: the same colour family, but not a straight swap. Runic Gold is a little darker, more saturated, cooler than Tainted Gold.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Runic Gold is a little darker, more saturated, cooler than Tainted Gold.
The same difference applies the other way round: Tainted Gold is a little lighter, more muted, 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 Tainted Gold on the colour wheel See Runic Gold on the colour wheel
All matches: Tainted Gold equivalents · Runic Gold equivalents