Golden Shine vs Radiant Yellow

How close are they?

ΔE 23.7, loose: different enough that you should pick on purpose. Radiant Yellow is noticeably darker, warmer than Golden Shine.

Can I use Radiant Yellow instead of Golden Shine?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 24). Radiant Yellow is noticeably darker, warmer than Golden Shine.

Can I use Golden Shine instead of Radiant Yellow?

The same difference applies the other way round: Golden Shine is noticeably lighter, 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.