Comparison

Summer Mist vs Lazy Day

Benjamin Moore CC-906 and Vista Paint 0596, ΔE 2.98 apart

Benjamin Moore Summer Mist CC-906 on a wall, hex #9DB2D0
Summer Mist Benjamin Moore CC-906
Vista Paint Lazy Day 0596 on a wall, hex #99AFD2
Lazy Day Vista Paint 0596
Zeytin’s verdict · ΔE 2.98Close cousins. Paint a sample of each before you choose.

Benjamin Moore Summer Mist (CC-906) and Vista Paint Lazy Day (0596) measure a delta-E of 2.98 apart. Summer Mist is 2.8 LRV points lighter, which is the difference you notice first. Lazy Day holds more color, chroma 20.2 against 17.6, so it grays out less in dim light. Close, but a large sample of each will show the gap, particularly against white trim. If you need the Lazy Day depth in Benjamin Moore's line, start from its LRV of 42.0 rather than matching by name.

Is Benjamin Moore Summer Mist the same color as Vista Paint Lazy Day?

Not quite, but close - Benjamin Moore Summer Mist and Vista Paint Lazy Day are delta-E 2.98 apart, close enough that most rooms would not show the difference.

What is the delta-E between Benjamin Moore Summer Mist and Vista Paint Lazy Day?

The measured color distance between Benjamin Moore Summer Mist and Vista Paint Lazy Day is delta-E 2.98.

Which is lighter, Benjamin Moore Summer Mist or Vista Paint Lazy Day?

Benjamin Moore Summer Mist is lighter than Vista Paint Lazy Day by 2.8 points of light reflectance (LRV).

CLOSEST PAIRΔE 2.98 Summer Mist and Lazy Day
LIGHTESTSummer Mist LRV 44.8
DARKESTLazy Day LRV 42.0
SPREAD2.8LRV points

Side by side

measured values
Summer Mist Lazy Day
Brand Benjamin Moore Vista Paint
Code CC-906 0596
Hex #9DB2D0 #99AFD2
Light reflectance 44.8 42.0
Undertone blue blue
Chroma 17.6 20.2
Hue angle 268.0° 270.9°
Color family blue blue

Each on its own

full detail