Radiation Glow vs Peanut Butter

How close are they?

ΔE 21.0, loose: different enough that you should pick on purpose. Peanut Butter is noticeably darker, more muted, cooler than Radiation Glow.

Can I use Peanut Butter instead of Radiation Glow?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 21). Peanut Butter is noticeably darker, more muted, cooler than Radiation Glow.

Can I use Radiation Glow instead of Peanut Butter?

The same difference applies the other way round: Radiation Glow is noticeably lighter, more saturated, 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.