Comparison

Moonmist vs Sea Foam Mist

Sherwin-Williams SW 9144 and Vista Paint 0642, ΔE 1.47 apart

Sherwin-Williams Moonmist SW 9144 on a wall, hex #C9D9E0
Moonmist Sherwin-Williams SW 9144
Vista Paint Sea Foam Mist 0642 on a wall, hex #CCDCE1
Sea Foam Mist Vista Paint 0642
Zeytin’s verdict · ΔE 1.47Twins, almost. Only daylight on a big wall tells them apart.

Sherwin-Williams Moonmist (SW 9144) and Vista Paint Sea Foam Mist (0642) measure a delta-E of 1.47 apart. Sea Foam Mist is 2.3 LRV points lighter, which is the difference you notice first. Both carry a similar amount of color, at chroma 6.6 and 6.1. The undertones part company: Moonmist reads as a cool blue-gray at hue angle 233.0 degrees, Sea Foam Mist as a cool teal-gray at 224.5. The difference is measurable but subtle. It shows on a large wall in strong daylight and disappears under lamplight. If you need the Moonmist depth in Vista Paint's line, start from its LRV of 67.7 rather than matching by name.

Is Sherwin-Williams Moonmist the same color as Vista Paint Sea Foam Mist?

Not quite, but close - Sherwin-Williams Moonmist and Vista Paint Sea Foam Mist are delta-E 1.47 apart, close enough that most rooms would not show the difference.

What is the delta-E between Sherwin-Williams Moonmist and Vista Paint Sea Foam Mist?

The measured color distance between Sherwin-Williams Moonmist and Vista Paint Sea Foam Mist is delta-E 1.47.

Which is lighter, Sherwin-Williams Moonmist or Vista Paint Sea Foam Mist?

Vista Paint Sea Foam Mist is lighter than Sherwin-Williams Moonmist by 2.3 points of light reflectance (LRV).

CLOSEST PAIRΔE 1.47 Moonmist and Sea Foam Mist
LIGHTESTSea Foam Mist LRV 70.0
DARKESTMoonmist LRV 67.7
SPREAD2.3LRV points

Side by side

measured values
Moonmist Sea Foam Mist
Brand Sherwin-Williams Vista Paint
Code SW 9144 0642
Hex #C9D9E0 #CCDCE1
Light reflectance 67.7 70.0
Undertone cool blue-gray cool teal-gray
Chroma 6.6 6.1
Hue angle 233.0° 224.5°
Color family gray gray

Each on its own

full detail