Comparison

Blue Spruce vs Portsmouth Blue

Benjamin Moore 1637 and Vista Paint H0049, ΔE 2.25 apart

Benjamin Moore Blue Spruce 1637 on a wall, hex #607077
Blue Spruce Benjamin Moore 1637
Vista Paint Portsmouth Blue H0049 on a wall, hex #5F7276
Portsmouth Blue Vista Paint H0049
Zeytin’s verdict · ΔE 2.25Close cousins. Paint a sample of each before you choose.

Benjamin Moore Blue Spruce (1637) and Vista Paint Portsmouth Blue (H0049) measure a delta-E of 2.25 apart. They sit within 0.8 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 7.3 and 7.6. The undertones part company: Blue Spruce reads as a blue undertone at hue angle 233.7 degrees, Portsmouth Blue as a teal undertone at 217.0. Close, but a large sample of each will show the gap, particularly against white trim. If you need the Portsmouth Blue depth in Benjamin Moore's line, start from its LRV of 16.0 rather than matching by name.

Is Benjamin Moore Blue Spruce the same color as Vista Paint Portsmouth Blue?

Not quite, but close - Benjamin Moore Blue Spruce and Vista Paint Portsmouth Blue are delta-E 2.25 apart, close enough that most rooms would not show the difference.

What is the delta-E between Benjamin Moore Blue Spruce and Vista Paint Portsmouth Blue?

The measured color distance between Benjamin Moore Blue Spruce and Vista Paint Portsmouth Blue is delta-E 2.25.

CLOSEST PAIRΔE 2.25 Blue Spruce and Portsmouth Blue
LIGHTESTBlue Spruce LRV 16.8
DARKESTPortsmouth Blue LRV 16.0
SPREAD0.8LRV points

Side by side

measured values
Blue Spruce Portsmouth Blue
Brand Benjamin Moore Vista Paint
Code 1637 H0049
Hex #607077 #5F7276
Light reflectance 16.8 16.0
Undertone blue undertone teal undertone
Chroma 7.3 7.6
Hue angle 233.7° 217.0°
Color family teal teal

Each on its own

full detail