Comparison

Celestial Horizon vs John's Blue

Dutch Boy DCP-0589 and Vista Paint 0617, ΔE 2.62 apart

Dutch Boy Celestial Horizon DCP-0589 on a wall, hex #8FA4BF
Celestial Horizon Dutch Boy DCP-0589
Vista Paint John's Blue 0617 on a wall, hex #87A4C0
John's Blue Vista Paint 0617
Zeytin’s verdict · ΔE 2.62Close cousins. Paint a sample of each before you choose.

Dutch Boy Celestial Horizon (DCP-0589) and Vista Paint John's Blue (0617) measure a delta-E of 2.62 apart. They sit within 0.2 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 16.3 and 18. Close, but a large sample of each will show the gap, particularly against white trim. If you need the John's Blue depth in Dutch Boy's line, start from its LRV of 36.0 rather than matching by name.

Is Dutch Boy Celestial Horizon the same color as Vista Paint John's Blue?

Not quite, but close - Dutch Boy Celestial Horizon and Vista Paint John's Blue are delta-E 2.62 apart, close enough that most rooms would not show the difference.

What is the delta-E between Dutch Boy Celestial Horizon and Vista Paint John's Blue?

The measured color distance between Dutch Boy Celestial Horizon and Vista Paint John's Blue is delta-E 2.62.

CLOSEST PAIRΔE 2.62 Celestial Horizon and John's Blue
LIGHTESTCelestial Horizon LRV 36.2
DARKESTJohn's Blue LRV 36.0
SPREAD0.2LRV points

Side by side

measured values
Celestial Horizon John's Blue
Brand Dutch Boy Vista Paint
Code DCP-0589 0617
Hex #8FA4BF #87A4C0
Light reflectance 36.2 36.0
Undertone blue blue
Chroma 16.3 18.0
Hue angle 265.7° 259.0°
Color family blue blue

Each on its own

full detail