Comparison

Skylark Song vs Something Blue

Benjamin Moore 778 and Sherwin-Williams SW 6800, ΔE 1.82 apart

Benjamin Moore Skylark Song 778 on a wall, hex #B4DBEA
Skylark Song Benjamin Moore 778
Sherwin-Williams Something Blue SW 6800 on a wall, hex #B0D6E6
Something Blue Sherwin-Williams SW 6800
Zeytin’s verdict · ΔE 1.82Twins, almost. Only daylight on a big wall tells them apart.

Benjamin Moore Skylark Song (778) and Sherwin-Williams Something Blue (SW 6800) measure a delta-E of 1.82 apart. Skylark Song is 3.1 LRV points lighter, which is the difference you notice first. Both carry a similar amount of color, at chroma 14.9 and 15. The difference is measurable but subtle. It shows on a large wall in strong daylight and disappears under lamplight. If you need the Something Blue depth in Benjamin Moore's line, start from its LRV of 63.0 rather than matching by name.

Is Benjamin Moore Skylark Song the same color as Sherwin-Williams Something Blue?

Not quite, but close - Benjamin Moore Skylark Song and Sherwin-Williams Something Blue are delta-E 1.82 apart, close enough that most rooms would not show the difference.

What is the delta-E between Benjamin Moore Skylark Song and Sherwin-Williams Something Blue?

The measured color distance between Benjamin Moore Skylark Song and Sherwin-Williams Something Blue is delta-E 1.82.

Which is lighter, Benjamin Moore Skylark Song or Sherwin-Williams Something Blue?

Benjamin Moore Skylark Song is lighter than Sherwin-Williams Something Blue by 3.1 points of light reflectance (LRV).

CLOSEST PAIRΔE 1.82 Skylark Song and Something Blue
LIGHTESTSkylark Song LRV 66.1
DARKESTSomething Blue LRV 63.0
SPREAD3.1LRV points

Side by side

measured values
Skylark Song Something Blue
Brand Benjamin Moore Sherwin-Williams
Code 778 SW 6800
Hex #B4DBEA #B0D6E6
Light reflectance 66.1 63.0
Undertone blue blue
Chroma 14.9 15.0
Hue angle 230.7° 233.2°
Color family teal teal

Each on its own

full detail