Comparison

Scarlet Past vs Siren

Dunn-Edwards DEA150 and Vista Paint 1117, ΔE 2.75 apart

Dunn-Edwards Scarlet Past DEA150 on a wall, hex #A53B3D
Scarlet Past Dunn-Edwards DEA150
Vista Paint Siren 1117 on a wall, hex #A23D40
Siren Vista Paint 1117
Zeytin’s verdict · ΔE 2.75Close cousins. Paint a sample of each before you choose.

Dunn-Edwards Scarlet Past (DEA150) and Vista Paint Siren (1117) measure a delta-E of 2.75 apart. They sit within 0.5 LRV points of each other, so neither will look brighter than the other on the same wall. Scarlet Past holds more color, chroma 49.2 against 46.7, so it grays out less in dim light. Close, but a large sample of each will show the gap, particularly against white trim. If you need the Siren depth in Dunn-Edwards's line, start from its LRV of 11.0 rather than matching by name.

Is Dunn-Edwards Scarlet Past the same color as Vista Paint Siren?

Not quite, but close - Dunn-Edwards Scarlet Past and Vista Paint Siren are delta-E 2.75 apart, close enough that most rooms would not show the difference.

What is the delta-E between Dunn-Edwards Scarlet Past and Vista Paint Siren?

The measured color distance between Dunn-Edwards Scarlet Past and Vista Paint Siren is delta-E 2.75.

CLOSEST PAIRΔE 2.75 Scarlet Past and Siren
LIGHTESTScarlet Past LRV 11.5
DARKESTSiren LRV 11.0
SPREAD0.5LRV points

Side by side

measured values
Scarlet Past Siren
Brand Dunn-Edwards Vista Paint
Code DEA150 1117
Hex #A53B3D #A23D40
Light reflectance 11.5 11.0
Undertone red red
Chroma 49.2 46.7
Hue angle 27.1° 25.8°
Color family red red

Each on its own

full detail