ΔE 13.6, fair: the same colour family, but not a straight swap. Radiant Yellow is noticeably darker than Dwarven Gold.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Radiant Yellow is noticeably darker than Dwarven Gold.
The same difference applies the other way round: Dwarven Gold is noticeably lighter.
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 Dwarven Gold on the colour wheel See Radiant Yellow on the colour wheel
All matches: Dwarven Gold equivalents · Radiant Yellow equivalents