Comparison

They call it Mellow vs Ray of Light

Sherwin-Williams SW 9015 and Vista Paint 0827, ΔE 5.65 apart

Sherwin-Williams They call it Mellow SW 9015 on a wall, hex #FBE4B3
They call it Mellow Sherwin-Williams SW 9015
Vista Paint Ray of Light 0827 on a wall, hex #FAEFBB
Ray of Light Vista Paint 0827
Zeytin’s verdict · ΔE 5.65Related, but your eyes will notice. These are different choices.

Sherwin-Williams They call it Mellow (SW 9015) and Vista Paint Ray of Light (0827) measure a delta-E of 5.65 apart. Ray of Light is 6.9 LRV points lighter, which is the difference you notice first. Both carry a similar amount of color, at chroma 26.8 and 26.9. These read as related but distinct. Sample both before committing. If you need the They call it Mellow depth in Vista Paint's line, start from its LRV of 79.1 rather than matching by name.

What is the difference between Sherwin-Williams They call it Mellow and Vista Paint Ray of Light?

Sherwin-Williams They call it Mellow and Vista Paint Ray of Light are delta-E 5.65 apart - a difference that shows up on a wall, not just side by side on two chips.

What is the delta-E between Sherwin-Williams They call it Mellow and Vista Paint Ray of Light?

The measured color distance between Sherwin-Williams They call it Mellow and Vista Paint Ray of Light is delta-E 5.65.

Which is lighter, Sherwin-Williams They call it Mellow or Vista Paint Ray of Light?

Vista Paint Ray of Light is lighter than Sherwin-Williams They call it Mellow by 6.9 points of light reflectance (LRV).

CLOSEST PAIRΔE 5.65 They call it Mellow and Ray of Light
LIGHTESTRay of Light LRV 86.0
DARKESTThey call it Mellow LRV 79.1
SPREAD6.9LRV points

Side by side

measured values
They call it Mellow Ray of Light
Brand Sherwin-Williams Vista Paint
Code SW 9015 0827
Hex #FBE4B3 #FAEFBB
Light reflectance 79.1 86.0
Undertone yellow yellow
Chroma 26.8 26.9
Hue angle 88.5° 99.0°
Color family orange yellow

Each on its own

full detail