Comparison

Office Blue vs Piece of the Sky

Valspar 4005-6A and Vista Paint 7304, ΔE 2.53 apart

Valspar Office Blue 4005-6A on a wall, hex #7797AC
Office Blue Valspar 4005-6A
Vista Paint Piece of the Sky 7304 on a wall, hex #7295AE
Piece of the Sky Vista Paint 7304
Zeytin’s verdict · ΔE 2.53Close cousins. Paint a sample of each before you choose.

Valspar Office Blue (4005-6A) and Vista Paint Piece of the Sky (7304) measure a delta-E of 2.53 apart. Office Blue is 3 LRV points lighter, which is the difference you notice first. Piece of the Sky holds more color, chroma 18 against 15.8, so it grays out less in dim light. Close, but a large sample of each will show the gap, particularly against white trim. If you need the Piece of the Sky depth in Valspar's line, start from its LRV of 26.0 rather than matching by name.

Is Valspar Office Blue the same color as Vista Paint Piece of the Sky?

Not quite, but close - Valspar Office Blue and Vista Paint Piece of the Sky are delta-E 2.53 apart, close enough that most rooms would not show the difference.

What is the delta-E between Valspar Office Blue and Vista Paint Piece of the Sky?

The measured color distance between Valspar Office Blue and Vista Paint Piece of the Sky is delta-E 2.53.

Which is lighter, Valspar Office Blue or Vista Paint Piece of the Sky?

Valspar Office Blue is lighter than Vista Paint Piece of the Sky by 3 points of light reflectance (LRV).

CLOSEST PAIRΔE 2.53 Office Blue and Piece of the Sky
LIGHTESTOffice Blue LRV 29.0
DARKESTPiece of the Sky LRV 26.0
SPREAD3LRV points

Side by side

measured values
Office Blue Piece of the Sky
Brand Valspar Vista Paint
Code 4005-6A 7304
Hex #7797AC #7295AE
Light reflectance 29.0 26.0
Undertone blue blue
Chroma 15.8 18.0
Hue angle 247.6° 251.0°
Color family teal teal

Each on its own

full detail