Comparison

Window Pane vs Mellow Blue

Sherwin-Williams SW 6210 and Vista Paint 0468, ΔE 1.55 apart

Sherwin-Williams Window Pane SW 6210 on a wall, hex #D7DFD8
Window Pane Sherwin-Williams SW 6210
Vista Paint Mellow Blue 0468 on a wall, hex #D9E3DD
Mellow Blue Vista Paint 0468
Zeytin’s verdict · ΔE 1.55Twins, almost. Only daylight on a big wall tells them apart.

Sherwin-Williams Window Pane (SW 6210) and Vista Paint Mellow Blue (0468) measure a delta-E of 1.55 apart. Mellow Blue is 3.8 LRV points lighter, which is the difference you notice first. Both carry a similar amount of color, at chroma 4.7 and 4.8. The difference is measurable but subtle. It shows on a large wall in strong daylight and disappears under lamplight. If you need the Window Pane depth in Vista Paint's line, start from its LRV of 72.2 rather than matching by name.

Is Sherwin-Williams Window Pane the same color as Vista Paint Mellow Blue?

Not quite, but close - Sherwin-Williams Window Pane and Vista Paint Mellow Blue are delta-E 1.55 apart, close enough that most rooms would not show the difference.

What is the delta-E between Sherwin-Williams Window Pane and Vista Paint Mellow Blue?

The measured color distance between Sherwin-Williams Window Pane and Vista Paint Mellow Blue is delta-E 1.55.

Which is lighter, Sherwin-Williams Window Pane or Vista Paint Mellow Blue?

Vista Paint Mellow Blue is lighter than Sherwin-Williams Window Pane by 3.8 points of light reflectance (LRV).

CLOSEST PAIRΔE 1.55 Window Pane and Mellow Blue
LIGHTESTMellow Blue LRV 76.0
DARKESTWindow Pane LRV 72.2
SPREAD3.8LRV points

Side by side

measured values
Window Pane Mellow Blue
Brand Sherwin-Williams Vista Paint
Code SW 6210 0468
Hex #D7DFD8 #D9E3DD
Light reflectance 72.2 76.0
Undertone green cast green cast
Chroma 4.7 4.8
Hue angle 147.9° 158.4°
Color family gray gray

Each on its own

full detail