Comparison

Gunsmith Gray vs Valley Vista

Benjamin Moore CW-65 and Vista Paint 8391, ΔE 2.18 apart

Benjamin Moore Gunsmith Gray CW-65 on a wall, hex #858374
Gunsmith Gray Benjamin Moore CW-65
Vista Paint Valley Vista 8391 on a wall, hex #808373
Valley Vista Vista Paint 8391
Zeytin’s verdict · ΔE 2.18Close cousins. Paint a sample of each before you choose.

Benjamin Moore Gunsmith Gray (CW-65) and Vista Paint Valley Vista (8391) measure a delta-E of 2.18 apart. Gunsmith Gray is 1.8 LRV points lighter, which is the difference you notice first. Both carry a similar amount of color, at chroma 8.6 and 9.3. The undertones part company: Gunsmith Gray reads as a yellow undertone at hue angle 103.6 degrees, Valley Vista as a yellow-green undertone at 116.7. Close, but a large sample of each will show the gap, particularly against white trim. If you need the Valley Vista depth in Benjamin Moore's line, start from its LRV of 22.0 rather than matching by name.

Is Benjamin Moore Gunsmith Gray the same color as Vista Paint Valley Vista?

Not quite, but close - Benjamin Moore Gunsmith Gray and Vista Paint Valley Vista are delta-E 2.18 apart, close enough that most rooms would not show the difference.

What is the delta-E between Benjamin Moore Gunsmith Gray and Vista Paint Valley Vista?

The measured color distance between Benjamin Moore Gunsmith Gray and Vista Paint Valley Vista is delta-E 2.18.

Which is lighter, Benjamin Moore Gunsmith Gray or Vista Paint Valley Vista?

Benjamin Moore Gunsmith Gray is lighter than Vista Paint Valley Vista by 1.8 points of light reflectance (LRV).

CLOSEST PAIRΔE 2.18 Gunsmith Gray and Valley Vista
LIGHTESTGunsmith Gray LRV 23.8
DARKESTValley Vista LRV 22.0
SPREAD1.8LRV points

Side by side

measured values
Gunsmith Gray Valley Vista
Brand Benjamin Moore Vista Paint
Code CW-65 8391
Hex #858374 #808373
Light reflectance 23.8 22.0
Undertone yellow undertone yellow-green undertone
Chroma 8.6 9.3
Hue angle 103.6° 116.7°
Color family yellow green

Each on its own

full detail