Comparison

Open Air vs Zircon Ice

Sherwin-Williams SW 6491 and Vista Paint 0664, ΔE 2.18 apart

Sherwin-Williams Open Air SW 6491 on a wall, hex #C7DFE0
Open Air Sherwin-Williams SW 6491
Vista Paint Zircon Ice 0664 on a wall, hex #CFE3E4
Zircon Ice Vista Paint 0664
Zeytin’s verdict · ΔE 2.18Close cousins. Paint a sample of each before you choose.

Sherwin-Williams Open Air (SW 6491) and Vista Paint Zircon Ice (0664) measure a delta-E of 2.18 apart. Zircon Ice is 3.9 LRV points lighter, which is the difference you notice first. Both carry a similar amount of color, at chroma 8.4 and 7. The undertones part company: Open Air reads as a teal undertone at hue angle 202.5 degrees, Zircon Ice as a cool teal-gray at 203.3. Close, but a large sample of each will show the gap, particularly against white trim. If you need the Open Air depth in Vista Paint's line, start from its LRV of 70.1 rather than matching by name.

Is Sherwin-Williams Open Air the same color as Vista Paint Zircon Ice?

Not quite, but close - Sherwin-Williams Open Air and Vista Paint Zircon Ice are delta-E 2.18 apart, close enough that most rooms would not show the difference.

What is the delta-E between Sherwin-Williams Open Air and Vista Paint Zircon Ice?

The measured color distance between Sherwin-Williams Open Air and Vista Paint Zircon Ice is delta-E 2.18.

Which is lighter, Sherwin-Williams Open Air or Vista Paint Zircon Ice?

Vista Paint Zircon Ice is lighter than Sherwin-Williams Open Air by 3.9 points of light reflectance (LRV).

CLOSEST PAIRΔE 2.18 Open Air and Zircon Ice
LIGHTESTZircon Ice LRV 74.0
DARKESTOpen Air LRV 70.1
SPREAD3.9LRV points

Side by side

measured values
Open Air Zircon Ice
Brand Sherwin-Williams Vista Paint
Code SW 6491 0664
Hex #C7DFE0 #CFE3E4
Light reflectance 70.1 74.0
Undertone teal undertone cool teal-gray
Chroma 8.4 7.0
Hue angle 202.5° 203.3°
Color family teal teal

Each on its own

full detail