Comparison

Light French Gray vs Place of Dust

Sherwin-Williams SW 0055 and Vista Paint 0539, ΔE 1.92 apart

Sherwin-Williams Light French Gray SW 0055 on a wall, hex #C2C0BB
Light French Gray Sherwin-Williams SW 0055
Vista Paint Place of Dust 0539 on a wall, hex #C7C5C1
Place of Dust Vista Paint 0539
Zeytin’s verdict · ΔE 1.92Twins, almost. Only daylight on a big wall tells them apart.

Sherwin-Williams Light French Gray (SW 0055) and Vista Paint Place of Dust (0539) measure a delta-E of 1.92 apart. Place of Dust is 4.4 LRV points lighter, which is the difference you notice first. Both carry a similar amount of color, at chroma 2.8 and 2.2. The difference is measurable but subtle. It shows on a large wall in strong daylight and disappears under lamplight. If you need the Light French Gray depth in Vista Paint's line, start from its LRV of 52.6 rather than matching by name.

Is Sherwin-Williams Light French Gray the same color as Vista Paint Place of Dust?

Not quite, but close - Sherwin-Williams Light French Gray and Vista Paint Place of Dust are delta-E 1.92 apart, close enough that most rooms would not show the difference.

What is the delta-E between Sherwin-Williams Light French Gray and Vista Paint Place of Dust?

The measured color distance between Sherwin-Williams Light French Gray and Vista Paint Place of Dust is delta-E 1.92.

Which is lighter, Sherwin-Williams Light French Gray or Vista Paint Place of Dust?

Vista Paint Place of Dust is lighter than Sherwin-Williams Light French Gray by 4.4 points of light reflectance (LRV).

CLOSEST PAIRΔE 1.92 Light French Gray and Place of Dust
LIGHTESTPlace of Dust LRV 57.0
DARKESTLight French Gray LRV 52.6
SPREAD4.4LRV points

Side by side

measured values
Light French Gray Place of Dust
Brand Sherwin-Williams Vista Paint
Code SW 0055 0539
Hex #C2C0BB #C7C5C1
Light reflectance 52.6 57.0
Undertone true neutral true neutral
Chroma 2.8 2.2
Hue angle 94.2° 90.7°
Color family gray gray

Each on its own

full detail