Comparison

Harmonic Tan vs Only Yesterday

Sherwin-Williams SW 6136 and Vista Paint 0296, ΔE 1.1 apart

Sherwin-Williams Harmonic Tan SW 6136 on a wall, hex #C6B08A
Harmonic Tan Sherwin-Williams SW 6136
Vista Paint Only Yesterday 0296 on a wall, hex #C9B38D
Only Yesterday Vista Paint 0296
Zeytin’s verdict · ΔE 1.1Twins, almost. Only daylight on a big wall tells them apart.

Sherwin-Williams Harmonic Tan (SW 6136) and Vista Paint Only Yesterday (0296) measure a delta-E of 1.1 apart. Only Yesterday is 3 LRV points lighter, which is the difference you notice first. Both carry a similar amount of color, at chroma 22.5 and 22.4. The difference is measurable but subtle. It shows on a large wall in strong daylight and disappears under lamplight. If you need the Harmonic Tan depth in Vista Paint's line, start from its LRV of 45.0 rather than matching by name.

Is Sherwin-Williams Harmonic Tan the same color as Vista Paint Only Yesterday?

Not quite, but close - Sherwin-Williams Harmonic Tan and Vista Paint Only Yesterday are delta-E 1.1 apart, close enough that most rooms would not show the difference.

What is the delta-E between Sherwin-Williams Harmonic Tan and Vista Paint Only Yesterday?

The measured color distance between Sherwin-Williams Harmonic Tan and Vista Paint Only Yesterday is delta-E 1.1.

Which is lighter, Sherwin-Williams Harmonic Tan or Vista Paint Only Yesterday?

Vista Paint Only Yesterday is lighter than Sherwin-Williams Harmonic Tan by 3 points of light reflectance (LRV).

CLOSEST PAIRΔE 1.1 Harmonic Tan and Only Yesterday
LIGHTESTOnly Yesterday LRV 48.0
DARKESTHarmonic Tan LRV 45.0
SPREAD3LRV points

Side by side

measured values
Harmonic Tan Only Yesterday
Brand Sherwin-Williams Vista Paint
Code SW 6136 0296
Hex #C6B08A #C9B38D
Light reflectance 45.0 48.0
Undertone yellow yellow
Chroma 22.5 22.4
Hue angle 84.4° 84.5°
Color family tan tan

Each on its own

full detail