Comparison

Flower Box vs London Fog

Benjamin Moore CSP-530 and Dunn-Edwards DE5920, ΔE 2.28 apart

Benjamin Moore Flower Box CSP-530 on a wall, hex #8690A4
Flower Box Benjamin Moore CSP-530
Dunn-Edwards London Fog DE5920 on a wall, hex #8D95AA
London Fog Dunn-Edwards DE5920
Zeytin’s verdict · ΔE 2.28Close cousins. Paint a sample of each before you choose.

Benjamin Moore Flower Box (CSP-530) and Dunn-Edwards London Fog (DE5920) measure a delta-E of 2.28 apart. They sit within 1.2 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 11.8 and 12.1. Close, but a large sample of each will show the gap, particularly against white trim. If you need the Flower Box depth in Dunn-Edwards's line, start from its LRV of 28.9 rather than matching by name.

Is Benjamin Moore Flower Box the same color as Dunn-Edwards London Fog?

Not quite, but close - Benjamin Moore Flower Box and Dunn-Edwards London Fog are delta-E 2.28 apart, close enough that most rooms would not show the difference.

What is the delta-E between Benjamin Moore Flower Box and Dunn-Edwards London Fog?

The measured color distance between Benjamin Moore Flower Box and Dunn-Edwards London Fog is delta-E 2.28.

Which is lighter, Benjamin Moore Flower Box or Dunn-Edwards London Fog?

Dunn-Edwards London Fog is lighter than Benjamin Moore Flower Box by 1.2 points of light reflectance (LRV).

CLOSEST PAIRΔE 2.28 Flower Box and London Fog
LIGHTESTLondon Fog LRV 30.1
DARKESTFlower Box LRV 28.9
SPREAD1.2LRV points

Side by side

measured values
Flower Box London Fog
Brand Benjamin Moore Dunn-Edwards
Code CSP-530 DE5920
Hex #8690A4 #8D95AA
Light reflectance 28.9 30.1
Undertone blue undertone blue undertone
Chroma 11.8 12.1
Hue angle 273.6° 277.7°
Color family blue blue

Each on its own

full detail