Comparison

Mythical vs Dancing in the Spring

Sherwin-Williams SW 6550 and Vista Paint 1291, ΔE 1.47 apart

Sherwin-Williams Mythical SW 6550 on a wall, hex #7E778E
Mythical Sherwin-Williams SW 6550
Vista Paint Dancing in the Spring 1291 on a wall, hex #81788D
Dancing in the Spring Vista Paint 1291
Zeytin’s verdict · ΔE 1.47Twins, almost. Only daylight on a big wall tells them apart.

Sherwin-Williams Mythical (SW 6550) and Vista Paint Dancing in the Spring (1291) measure a delta-E of 1.47 apart. They sit within 0.3 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 13.7 and 12.7. The difference is measurable but subtle. It shows on a large wall in strong daylight and disappears under lamplight. If you need the Mythical depth in Vista Paint's line, start from its LRV of 19.7 rather than matching by name.

Is Sherwin-Williams Mythical the same color as Vista Paint Dancing in the Spring?

Not quite, but close - Sherwin-Williams Mythical and Vista Paint Dancing in the Spring are delta-E 1.47 apart, close enough that most rooms would not show the difference.

What is the delta-E between Sherwin-Williams Mythical and Vista Paint Dancing in the Spring?

The measured color distance between Sherwin-Williams Mythical and Vista Paint Dancing in the Spring is delta-E 1.47.

CLOSEST PAIRΔE 1.47 Mythical and Dancing in the Spring
LIGHTESTDancing in the Spring LRV 20.0
DARKESTMythical LRV 19.7
SPREAD0.3LRV points

Side by side

measured values
Mythical Dancing in the Spring
Brand Sherwin-Williams Vista Paint
Code SW 6550 1291
Hex #7E778E #81788D
Light reflectance 19.7 20.0
Undertone violet undertone violet undertone
Chroma 13.7 12.7
Hue angle 302.9° 307.3°
Color family blue purple

Each on its own

full detail