Comparison

River Blue vs Moscow Midnight

Benjamin Moore 2057-10 and Sherwin-Williams SW 9142, ΔE 2.38 apart

Benjamin Moore River Blue 2057-10 on a wall, hex #254952
River Blue Benjamin Moore 2057-10
Sherwin-Williams Moscow Midnight SW 9142 on a wall, hex #204652
Moscow Midnight Sherwin-Williams SW 9142
Zeytin’s verdict · ΔE 2.38Close cousins. Paint a sample of each before you choose.

Benjamin Moore River Blue (2057-10) and Sherwin-Williams Moscow Midnight (SW 9142) measure a delta-E of 2.38 apart. River Blue is 2 LRV points lighter, which is the difference you notice first. Both carry a similar amount of color, at chroma 13.7 and 14.7. The undertones part company: River Blue reads as a teal undertone at hue angle 222.9 degrees, Moscow Midnight as a teal at 230.0. Close, but a large sample of each will show the gap, particularly against white trim. If you need the Moscow Midnight depth in Benjamin Moore's line, start from its LRV of 5.3 rather than matching by name.

Is Benjamin Moore River Blue the same color as Sherwin-Williams Moscow Midnight?

Not quite, but close - Benjamin Moore River Blue and Sherwin-Williams Moscow Midnight are delta-E 2.38 apart, close enough that most rooms would not show the difference.

What is the delta-E between Benjamin Moore River Blue and Sherwin-Williams Moscow Midnight?

The measured color distance between Benjamin Moore River Blue and Sherwin-Williams Moscow Midnight is delta-E 2.38.

Which is lighter, Benjamin Moore River Blue or Sherwin-Williams Moscow Midnight?

Benjamin Moore River Blue is lighter than Sherwin-Williams Moscow Midnight by 2 points of light reflectance (LRV).

CLOSEST PAIRΔE 2.38 River Blue and Moscow Midnight
LIGHTESTRiver Blue LRV 7.3
DARKESTMoscow Midnight LRV 5.3
SPREAD2LRV points

Side by side

measured values
River Blue Moscow Midnight
Brand Benjamin Moore Sherwin-Williams
Code 2057-10 SW 9142
Hex #254952 #204652
Light reflectance 7.3 5.3
Undertone teal undertone teal
Chroma 13.7 14.7
Hue angle 222.9° 230.0°
Color family black black

Each on its own

full detail