Comparison

Westchester Gray vs Emu

Sherwin-Williams SW 2849 and Vista Paint 0549, ΔE 2.86 apart

Sherwin-Williams Westchester Gray SW 2849 on a wall, hex #797978
Westchester Gray Sherwin-Williams SW 2849
Vista Paint Emu 0549 on a wall, hex #7A7473
Emu Vista Paint 0549
Zeytin’s verdict · ΔE 2.86Close cousins. Paint a sample of each before you choose.

Sherwin-Williams Westchester Gray (SW 2849) and Vista Paint Emu (0549) measure a delta-E of 2.86 apart. They sit within 1.2 LRV points of each other, so neither will look brighter than the other on the same wall. Both carry a similar amount of color, at chroma 0.6 and 2.5. Close, but a large sample of each will show the gap, particularly against white trim. If you need the Emu depth in Sherwin-Williams's line, start from its LRV of 18.0 rather than matching by name.

Is Sherwin-Williams Westchester Gray the same color as Vista Paint Emu?

Not quite, but close - Sherwin-Williams Westchester Gray and Vista Paint Emu are delta-E 2.86 apart, close enough that most rooms would not show the difference.

What is the delta-E between Sherwin-Williams Westchester Gray and Vista Paint Emu?

The measured color distance between Sherwin-Williams Westchester Gray and Vista Paint Emu is delta-E 2.86.

Which is lighter, Sherwin-Williams Westchester Gray or Vista Paint Emu?

Sherwin-Williams Westchester Gray is lighter than Vista Paint Emu by 1.2 points of light reflectance (LRV).

CLOSEST PAIRΔE 2.86 Westchester Gray and Emu
LIGHTESTWestchester Gray LRV 19.2
DARKESTEmu LRV 18.0
SPREAD1.2LRV points

Side by side

measured values
Westchester Gray Emu
Brand Sherwin-Williams Vista Paint
Code SW 2849 0549
Hex #797978 #7A7473
Light reflectance 19.2 18.0
Undertone true neutral true neutral
Chroma 0.6 2.5
Hue angle 110.3° 33.0°
Color family gray gray

Each on its own

full detail