Victorian Brass vs Radiant Yellow

How close are they?

ΔE 20.2, loose: different enough that you should pick on purpose. Radiant Yellow is a little darker, more saturated, cooler than Victorian Brass.

Can I use Radiant Yellow instead of Victorian Brass?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 20). Radiant Yellow is a little darker, more saturated, cooler than Victorian Brass.

Can I use Victorian Brass instead of Radiant Yellow?

The same difference applies the other way round: Victorian Brass 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.