Comparison

Fountain vs Patch of Blue

Sherwin-Williams SW 6787 and Vista Paint 7431, ΔE 1.73 apart

Sherwin-Williams Fountain SW 6787 on a wall, hex #56B5CA
Fountain Sherwin-Williams SW 6787
Vista Paint Patch of Blue 7431 on a wall, hex #56B4C6
Patch of Blue Vista Paint 7431
Zeytin’s verdict · ΔE 1.73Twins, almost. Only daylight on a big wall tells them apart.

Sherwin-Williams Fountain (SW 6787) and Vista Paint Patch of Blue (7431) measure a delta-E of 1.73 apart. Fountain is 3.4 LRV points lighter, which is the difference you notice first. Both carry a similar amount of color, at chroma 29.1 and 28.6. The difference is measurable but subtle. It shows on a large wall in strong daylight and disappears under lamplight. If you need the Patch of Blue depth in Sherwin-Williams's line, start from its LRV of 36.0 rather than matching by name.

Is Sherwin-Williams Fountain the same color as Vista Paint Patch of Blue?

Not quite, but close - Sherwin-Williams Fountain and Vista Paint Patch of Blue are delta-E 1.73 apart, close enough that most rooms would not show the difference.

What is the delta-E between Sherwin-Williams Fountain and Vista Paint Patch of Blue?

The measured color distance between Sherwin-Williams Fountain and Vista Paint Patch of Blue is delta-E 1.73.

Which is lighter, Sherwin-Williams Fountain or Vista Paint Patch of Blue?

Sherwin-Williams Fountain is lighter than Vista Paint Patch of Blue by 3.4 points of light reflectance (LRV).

CLOSEST PAIRΔE 1.73 Fountain and Patch of Blue
LIGHTESTFountain LRV 39.4
DARKESTPatch of Blue LRV 36.0
SPREAD3.4LRV points

Side by side

measured values
Fountain Patch of Blue
Brand Sherwin-Williams Vista Paint
Code SW 6787 7431
Hex #56B5CA #56B4C6
Light reflectance 39.4 36.0
Undertone teal teal
Chroma 29.1 28.6
Hue angle 221.1° 217.9°
Color family teal teal

Each on its own

full detail