Comparison

Onyx White vs Pastel Day

Benjamin Moore OC-74 and Vista Paint 0166, ΔE 0.98 apart

Benjamin Moore Onyx White OC-74 on a wall, hex #F2E3D0
Onyx White Benjamin Moore OC-74
Vista Paint Pastel Day 0166 on a wall, hex #F5E5D1
Pastel Day Vista Paint 0166
Zeytin’s verdict · ΔE 0.98Same color. Buy the cheaper one.

Benjamin Moore Onyx White (OC-74) and Vista Paint Pastel Day (0166) measure a delta-E of 0.98 apart. Pastel Day is 4.3 LRV points lighter, which is the difference you notice first. Both carry a similar amount of color, at chroma 11.3 and 11.9. Side by side on a wall these are effectively the same color. Choose on price and availability rather than appearance. If you need the Onyx White depth in Vista Paint's line, start from its LRV of 76.7 rather than matching by name.

Is Benjamin Moore Onyx White the same color as Vista Paint Pastel Day?

Yes, by measurement - Benjamin Moore Onyx White and Vista Paint Pastel Day are only delta-E 0.98 apart, which is below what the human eye can reliably tell apart.

What is the delta-E between Benjamin Moore Onyx White and Vista Paint Pastel Day?

The measured color distance between Benjamin Moore Onyx White and Vista Paint Pastel Day is delta-E 0.98.

Which is lighter, Benjamin Moore Onyx White or Vista Paint Pastel Day?

Vista Paint Pastel Day is lighter than Benjamin Moore Onyx White by 4.3 points of light reflectance (LRV).

CLOSEST PAIRΔE 0.98 Onyx White and Pastel Day
LIGHTESTPastel Day LRV 81.0
DARKESTOnyx White LRV 76.7
SPREAD4.3LRV points

Side by side

measured values
Onyx White Pastel Day
Brand Benjamin Moore Vista Paint
Code OC-74 0166
Hex #F2E3D0 #F5E5D1
Light reflectance 76.7 81.0
Undertone yellow undertone yellow undertone
Chroma 11.3 11.9
Hue angle 79.7° 79.3°
Color family tan tan

Each on its own

full detail