Comparison

Nelson Blue vs Sea Salt

Benjamin Moore CW-635 and Sherwin-Williams SW 6204, ΔE 1.96 apart

Benjamin Moore Nelson Blue CW-635 on a wall, hex #CED6D0
Nelson Blue Benjamin Moore CW-635
Sherwin-Williams Sea Salt SW 6204 on a wall, hex #CDD2CA
Sea Salt Sherwin-Williams SW 6204
Zeytin’s verdict · ΔE 1.96Twins, almost. Only daylight on a big wall tells them apart.

Benjamin Moore Nelson Blue (CW-635) and Sherwin-Williams Sea Salt (SW 6204) measure a delta-E of 1.96 apart. Nelson Blue is 2.2 LRV points lighter, which is the difference you notice first. Both carry a similar amount of color, at chroma 4.3 and 4.6. The undertones part company: Nelson Blue reads as a green cast at hue angle 152.1 degrees, Sea Salt as a yellow-green cast at 133.2. The difference is measurable but subtle. It shows on a large wall in strong daylight and disappears under lamplight. If you need the Sea Salt depth in Benjamin Moore's line, start from its LRV of 63.2 rather than matching by name.

Is Benjamin Moore Nelson Blue the same color as Sherwin-Williams Sea Salt?

Not quite, but close - Benjamin Moore Nelson Blue and Sherwin-Williams Sea Salt are delta-E 1.96 apart, close enough that most rooms would not show the difference.

What is the delta-E between Benjamin Moore Nelson Blue and Sherwin-Williams Sea Salt?

The measured color distance between Benjamin Moore Nelson Blue and Sherwin-Williams Sea Salt is delta-E 1.96.

Which is lighter, Benjamin Moore Nelson Blue or Sherwin-Williams Sea Salt?

Benjamin Moore Nelson Blue is lighter than Sherwin-Williams Sea Salt by 2.2 points of light reflectance (LRV).

CLOSEST PAIRΔE 1.96 Nelson Blue and Sea Salt
LIGHTESTNelson Blue LRV 65.4
DARKESTSea Salt LRV 63.2
SPREAD2.2LRV points

Side by side

measured values
Nelson Blue Sea Salt
Brand Benjamin Moore Sherwin-Williams
Code CW-635 SW 6204
Hex #CED6D0 #CDD2CA
Light reflectance 65.4 63.2
Undertone green cast yellow-green cast
Chroma 4.3 4.6
Hue angle 152.1° 133.2°
Color family gray gray

Each on its own

full detail