Peeps in Behr

The closest Behr paint to Vista Paint Peeps (0857) is Flame Yellow 360B-6, a delta-E of 1.52 away — close enough to swap without anyone noticing, though a large sample in daylight will show the difference.

Light reflectance is effectively identical, 68.0 against 68.0. Undertone reads as yellow against yellow, at chroma 69.7 and 71.0.

Codes are not transferable between manufacturers and no brand publishes a conversion table, so every figure here is measured from the published hex values rather than taken from a chart.