Cosmic Cobalt vs Agreeable Gray
Cosmic Cobalt (Behr) and Agreeable Gray (Sherwin-Williams) come from different manufacturers. Cosmic Cobalt reads as blue, while Agreeable Gray reads as greige-grey — two distinct hue families, not close cousins. The 51-point LRV gap — 60 for Agreeable Gray vs 10 for Cosmic Cobalt — means Agreeable Gray will open up a space more effectively. Where Cosmic Cobalt leans blue, Agreeable Gray reads warm — a distinction that shifts noticeably depending on the light source and surrounding finishes. A ΔE of 55.8 puts these firmly in different territory — two distinct design choices rather than close alternatives. Below you'll find 2 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Cosmic Cobalt vs Agreeable Gray in Real Spaces
2 real rooms side by side. Seeing Cosmic Cobalt and Agreeable Gray in actual rooms makes the difference concrete; browse the spaces below to get a feel for how each color lives on a wall.
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. Agreeable Gray returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
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. Agreeable Gray reflects noticeably more light off the walls, making the space read more open than Cosmic Cobalt.
Color Details
Cosmic Cobalt vs Agreeable Gray Simulated Comparison
5 simulated room previews — drag the slider on each to see Cosmic Cobalt on one side and Agreeable Gray 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.
White Dove reflects far more light (LRV 83 vs 10), opening up a space where Cosmic Cobalt encloses it.
At LRV 69 vs 10, Ammonite is decisively the brighter choice.
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.
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.
With LRVs of 12 and 10, 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.
At LRV 68 vs 10, Calamine is decisively the brighter choice.
At LRV 25 vs 10, Treron 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.
Their light reflectance is nearly identical (LRV 10 vs 7), so neither reads brighter in a room.
At LRV 24 vs 10, Cement grey is decisively the brighter choice.
At LRV 57 vs 10, Guilford Green is decisively the brighter choice.
At LRV 72 vs 10, Just Walnut is decisively the brighter choice.