Comparison

Tranquil Blue vs Stillwater

Benjamin Moore 2051-50 and Vista Paint 0687, ΔE 1.55 apart

Benjamin Moore Tranquil Blue 2051-50 on a wall, hex #94C2C5
Tranquil Blue Benjamin Moore 2051-50
Vista Paint Stillwater 0687 on a wall, hex #91C2C3
Stillwater Vista Paint 0687
Zeytin’s verdict · ΔE 1.55Twins, almost. Only daylight on a big wall tells them apart.

Benjamin Moore Tranquil Blue (2051-50) and Vista Paint Stillwater (0687) measure a delta-E of 1.55 apart. They sit within 0.2 LRV points of each other, so neither will look brighter than the other on the same wall. Both carry a similar amount of color, at chroma 15.8 and 16.7. The difference is measurable but subtle. It shows on a large wall in strong daylight and disappears under lamplight. If you need the Tranquil Blue depth in Vista Paint's line, start from its LRV of 48.8 rather than matching by name.

Is Benjamin Moore Tranquil Blue the same color as Vista Paint Stillwater?

Not quite, but close - Benjamin Moore Tranquil Blue and Vista Paint Stillwater are delta-E 1.55 apart, close enough that most rooms would not show the difference.

What is the delta-E between Benjamin Moore Tranquil Blue and Vista Paint Stillwater?

The measured color distance between Benjamin Moore Tranquil Blue and Vista Paint Stillwater is delta-E 1.55.

CLOSEST PAIRΔE 1.55 Tranquil Blue and Stillwater
LIGHTESTStillwater LRV 49.0
DARKESTTranquil Blue LRV 48.8
SPREAD0.2LRV points

Side by side

measured values
Tranquil Blue Stillwater
Brand Benjamin Moore Vista Paint
Code 2051-50 0687
Hex #94C2C5 #91C2C3
Light reflectance 48.8 49.0
Undertone teal teal
Chroma 15.8 16.7
Hue angle 204.2° 200.0°
Color family teal teal

Each on its own

full detail