Comparison

Summer Nights vs Prairie Night

Benjamin Moore 777 and Vista Paint 7341, ΔE 2.63 apart

Benjamin Moore Summer Nights 777 on a wall, hex #34586C
Summer Nights Benjamin Moore 777
Vista Paint Prairie Night 7341 on a wall, hex #3A5A71
Prairie Night Vista Paint 7341
Zeytin’s verdict · ΔE 2.63Close cousins. Paint a sample of each before you choose.

Benjamin Moore Summer Nights (777) and Vista Paint Prairie Night (7341) measure a delta-E of 2.63 apart. Summer Nights is 2.8 LRV points lighter, which is the difference you notice first. Both carry a similar amount of color, at chroma 16.9 and 17.4. Close, but a large sample of each will show the gap, particularly against white trim. If you need the Prairie Night depth in Benjamin Moore's line, start from its LRV of 8.0 rather than matching by name.

Is Benjamin Moore Summer Nights the same color as Vista Paint Prairie Night?

Not quite, but close - Benjamin Moore Summer Nights and Vista Paint Prairie Night are delta-E 2.63 apart, close enough that most rooms would not show the difference.

What is the delta-E between Benjamin Moore Summer Nights and Vista Paint Prairie Night?

The measured color distance between Benjamin Moore Summer Nights and Vista Paint Prairie Night is delta-E 2.63.

Which is lighter, Benjamin Moore Summer Nights or Vista Paint Prairie Night?

Benjamin Moore Summer Nights is lighter than Vista Paint Prairie Night by 2.8 points of light reflectance (LRV).

CLOSEST PAIRΔE 2.63 Summer Nights and Prairie Night
LIGHTESTSummer Nights LRV 10.8
DARKESTPrairie Night LRV 8.0
SPREAD2.8LRV points

Side by side

measured values
Summer Nights Prairie Night
Brand Benjamin Moore Vista Paint
Code 777 7341
Hex #34586C #3A5A71
Light reflectance 10.8 8.0
Undertone blue blue
Chroma 16.9 17.4
Hue angle 246.3° 253.9°
Color family black black

Each on its own

full detail