Radiation Glow vs Yellow FS13538

How close are they?

ΔE 11.4, fair: the same colour family, but not a straight swap. Yellow FS13538 is more saturated than Radiation Glow.

Can I use Yellow FS13538 instead of Radiation Glow?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Yellow FS13538 is more saturated than Radiation Glow.

Can I use Radiation Glow instead of Yellow FS13538?

The same difference applies the other way round: Radiation Glow is more muted.

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.