Cosmic Cobalt vs Blue Plate
Cosmic Cobalt (Behr) and Blue Plate (Sherwin-Williams) come from different manufacturers. These are both blues, so the question isn't which hue to choose — it's where within blue to land. The 7-point LRV gap — 17 for Blue Plate vs 10 for Cosmic Cobalt — means Blue Plate will open up a space more effectively. Where Cosmic Cobalt leans blue, Blue Plate reads cool — a distinction that shifts noticeably depending on the light source and surrounding finishes. ΔE 9.6 means they're clearly different, but not dramatically so — they'd pair well in the same room. Below you'll find 2 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Cosmic Cobalt vs Blue Plate in Real Spaces
2 real rooms side by side. Cosmic Cobalt and Blue Plate are close enough that the difference can be hard to judge from a chip alone — these photos show how each reads at scale, across different spaces and lighting conditions.
Home Office
Home office walls matter more than most — you're looking at them all day, and a color that reads fine at first can become tiring over time. Blue Plate has the edge in reflectance, which shows as a quiet sense of added space rather than an obvious contrast.
Front Door
On a front door, the color is both the first and last thing you see — a context where even a modest tonal difference reads clearly. Blue Plate reads slightly lighter here — a subtle but real difference in how open the space feels.
Color Details
Cosmic Cobalt vs Blue Plate Simulated Comparison
5 simulated room previews — drag the slider on each to see Cosmic Cobalt on one side and Blue Plate on the other.
Digital color is approximate. These simulations are generated from the manufacturer's hex values and overlaid on grayscale room photos — your screen's calibration, brightness, and viewing angle all affect how they render. Before committing to either color, test physical samples in your own space under the light you actually live with.
More Cosmic Cobalt comparisons
See how Cosmic Cobalt stacks up against other well-photographed colors across different brands and tones.
At LRV 69 vs 10, Ammonite is decisively the brighter choice.
White Dove reflects far more light (LRV 83 vs 10), opening up a space where Cosmic Cobalt encloses it.
Cosmic Cobalt reads slightly lighter (LRV 10 vs 6), a gap that shows most in low-lit rooms.
At LRV 52 vs 10, Purbeck Stone is decisively the brighter choice.
At LRV 30 vs 10, Evergreen Fog is decisively the brighter choice.
Mizzle reflects far more light (LRV 52 vs 10), opening up a space where Cosmic Cobalt encloses it.
At LRV 60 vs 10, Agreeable Gray is decisively the brighter choice.
Accessible Beige reflects far more light (LRV 58 vs 10), opening up a space where Cosmic Cobalt encloses it.
Denim Drift reflects far more light (LRV 27 vs 10), opening up a space where Cosmic Cobalt encloses it.
At LRV 43 vs 10, French Gray is decisively the brighter choice.
A 5-point LRV gap (10 vs 4) makes Cosmic Cobalt the marginally brighter of the two.
Tranquil Dawn reflects far more light (LRV 55 vs 10), opening up a space where Cosmic Cobalt encloses it.
Bancha reads slightly lighter (LRV 13 vs 10), a gap that shows most in low-lit rooms.
Hardwick White reflects far more light (LRV 44 vs 10), opening up a space where Cosmic Cobalt encloses it.
At LRV 84 vs 10, Pure White is decisively the brighter choice.
A 12-point LRV gap (21 vs 10) makes Artichoke the marginally brighter of the two.
Balboa Mist reflects far more light (LRV 66 vs 10), opening up a space where Cosmic Cobalt encloses it.
Shoji White reflects far more light (LRV 74 vs 10), opening up a space where Cosmic Cobalt encloses it.
Snowbound reflects far more light (LRV 83 vs 10), opening up a space where Cosmic Cobalt encloses it.
At LRV 51 vs 10, Pigeon is decisively the brighter choice.
With LRVs of 12 and 10, the two reflect almost the same amount of light.
With LRVs of 10 and 8, the two reflect almost the same amount of light.
Skimming Stone reflects far more light (LRV 68 vs 10), opening up a space where Cosmic Cobalt encloses it.
At LRV 41 vs 10, Dix Blue is decisively the brighter choice.
With LRVs of 12 and 10, the two reflect almost the same amount of light.
Saybrook Sage reflects far more light (LRV 45 vs 10), opening up a space where Cosmic Cobalt encloses it.
At LRV 31 vs 10, Pale Green is decisively the brighter choice.