Comparison

Gentle Butterfly vs Rosy Tan

Benjamin Moore 2173-70 and Dunn-Edwards DE6085, ΔE 1.25 apart

Benjamin Moore Gentle Butterfly 2173-70 on a wall, hex #F7E8E2
Gentle Butterfly Benjamin Moore 2173-70
Dunn-Edwards Rosy Tan DE6085 on a wall, hex #FAE8E1
Rosy Tan Dunn-Edwards DE6085
Zeytin’s verdict · ΔE 1.25Twins, almost. Only daylight on a big wall tells them apart.

Benjamin Moore Gentle Butterfly (2173-70) and Dunn-Edwards Rosy Tan (DE6085) measure a delta-E of 1.25 apart. Rosy Tan is 1.9 LRV points lighter, which is the difference you notice first. Both carry a similar amount of color, at chroma 6.2 and 7.5. The undertones part company: Gentle Butterfly reads as a greige at hue angle 49.2 degrees, Rosy Tan as a red undertone at 48.4. The difference is measurable but subtle. It shows on a large wall in strong daylight and disappears under lamplight. If you need the Gentle Butterfly depth in Dunn-Edwards's line, start from its LRV of 81.6 rather than matching by name.

Is Benjamin Moore Gentle Butterfly the same color as Dunn-Edwards Rosy Tan?

Not quite, but close - Benjamin Moore Gentle Butterfly and Dunn-Edwards Rosy Tan are delta-E 1.25 apart, close enough that most rooms would not show the difference.

What is the delta-E between Benjamin Moore Gentle Butterfly and Dunn-Edwards Rosy Tan?

The measured color distance between Benjamin Moore Gentle Butterfly and Dunn-Edwards Rosy Tan is delta-E 1.25.

Which is lighter, Benjamin Moore Gentle Butterfly or Dunn-Edwards Rosy Tan?

Dunn-Edwards Rosy Tan is lighter than Benjamin Moore Gentle Butterfly by 1.9 points of light reflectance (LRV).

CLOSEST PAIRΔE 1.25 Gentle Butterfly and Rosy Tan
LIGHTESTRosy Tan LRV 83.5
DARKESTGentle Butterfly LRV 81.6
SPREAD1.9LRV points

Side by side

measured values
Gentle Butterfly Rosy Tan
Brand Benjamin Moore Dunn-Edwards
Code 2173-70 DE6085
Hex #F7E8E2 #FAE8E1
Light reflectance 81.6 83.5
Undertone greige red undertone
Chroma 6.2 7.5
Hue angle 49.2° 48.4°
Color family gray white

Each on its own

full detail