Comparison

Rhine River vs Festoon Aqua

Benjamin Moore 689 and Sherwin-Williams SW 0019, ΔE 1.71 apart

Benjamin Moore Rhine River 689 on a wall, hex #A4BBB6
Rhine River Benjamin Moore 689
Sherwin-Williams Festoon Aqua SW 0019 on a wall, hex #A0BBB8
Festoon Aqua Sherwin-Williams SW 0019
Zeytin’s verdict · ΔE 1.71Twins, almost. Only daylight on a big wall tells them apart.

Benjamin Moore Rhine River (689) and Sherwin-Williams Festoon Aqua (SW 0019) measure a delta-E of 1.71 apart. They sit within 0.5 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 8.8 and 9.9. The undertones part company: Rhine River reads as a green undertone at hue angle 180.9 degrees, Festoon Aqua as a teal undertone at 189.1. The difference is measurable but subtle. It shows on a large wall in strong daylight and disappears under lamplight. If you need the Festoon Aqua depth in Benjamin Moore's line, start from its LRV of 46.6 rather than matching by name.

Is Benjamin Moore Rhine River the same color as Sherwin-Williams Festoon Aqua?

Not quite, but close - Benjamin Moore Rhine River and Sherwin-Williams Festoon Aqua are delta-E 1.71 apart, close enough that most rooms would not show the difference.

What is the delta-E between Benjamin Moore Rhine River and Sherwin-Williams Festoon Aqua?

The measured color distance between Benjamin Moore Rhine River and Sherwin-Williams Festoon Aqua is delta-E 1.71.

CLOSEST PAIRΔE 1.71 Rhine River and Festoon Aqua
LIGHTESTRhine River LRV 47.1
DARKESTFestoon Aqua LRV 46.6
SPREAD0.5LRV points

Side by side

measured values
Rhine River Festoon Aqua
Brand Benjamin Moore Sherwin-Williams
Code 689 SW 0019
Hex #A4BBB6 #A0BBB8
Light reflectance 47.1 46.6
Undertone green undertone teal undertone
Chroma 8.8 9.9
Hue angle 180.9° 189.1°
Color family teal teal

Each on its own

full detail