Radiant Yellow vs Yriel Yellow

How close are they?

ΔE 11.2, fair: the same colour family, but not a straight swap. Yriel Yellow is a little darker, more saturated, warmer than Radiant Yellow.

Can I use Yriel Yellow instead of Radiant Yellow?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Yriel Yellow is a little darker, more saturated, warmer than Radiant Yellow.

Can I use Radiant Yellow instead of Yriel Yellow?

The same difference applies the other way round: Radiant Yellow is a little lighter, more muted, 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.