Cosmos vs Dahlia
Cosmos and Dahlia come from the same Sherwin-Williams collection. These are both blues, so the question isn't which hue to choose — it's where within blue to land. The 6-point LRV gap — 38 for Cosmos vs 32 for Dahlia — means Cosmos will open up a space more effectively. Both share a cool character, which means they'll respond to light and surrounding materials in similar ways. A ΔE of 13.2 puts these firmly in different territory — two distinct design choices rather than close alternatives. Below you'll find 10 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Cosmos vs Dahlia in Real Spaces
10 real rooms side by side. Seeing Cosmos and Dahlia in actual rooms makes the difference concrete; browse the spaces below to get a feel for how each color lives on a wall.
Living Room
A living room wall sees more varied light than almost any other surface in the house, which makes the choice between these two more nuanced than a chip suggests. Cosmos reads slightly lighter here — a subtle but real difference in how open the space feels.
Bedroom
Bedrooms are typically lit with warmer, lower light than the rest of the house — a condition that flatters warm tones and deepens cool ones. Cosmos has the edge in reflectance, which shows as a quiet sense of added space rather than an obvious contrast.
Kitchen
Kitchens often have the harshest, most revealing light in the house — under-cabinet LEDs and overhead fixtures that strip away subtlety. Cosmos has the edge in reflectance, which shows as a quiet sense of added space rather than an obvious contrast.
Dining Room
Dining rooms often rely on warm incandescent or candlelight, which flatters warm undertones and mutes cool ones. The brightness difference is modest but present — Cosmos gives the walls a little more lift.
Bathroom
Small bathrooms intensify color. A shade that seems quiet in a larger room can feel immersive when you're surrounded by it on four walls. Cosmos has the edge in reflectance, which shows as a quiet sense of added space rather than an obvious contrast.
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. Cosmos has the edge in reflectance, which shows as a quiet sense of added space rather than an obvious contrast.
Mudroom
In a hardworking space like a mudroom, the depth and warmth of a color reads differently than in a quieter room. The brightness difference is modest but present — Cosmos gives the walls a little more lift.
Patio
Exterior colors look different in open light — both tend to read lighter outside than on an interior swatch, and shadows read more strongly. The brightness difference is modest but present — Cosmos gives the walls a little more lift.
House
A full exterior is the most demanding test for a paint color — scale and outdoor light both amplify differences that seem small on a swatch. Cosmos has the edge in reflectance, which shows as a quiet sense of added space rather than an obvious contrast.
Color Details
Cosmos vs Dahlia Simulated Comparison
5 simulated room previews — drag the slider on each to see Cosmos on one side and Dahlia 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 Cosmos comparisons
See how Cosmos stacks up against other well-photographed colors across different brands and tones.
At LRV 83 vs 38, White Dove is decisively the brighter choice.
Purbeck Stone reflects far more light (LRV 52 vs 38), opening up a space where Cosmos encloses it.
Cosmos reads slightly lighter (LRV 38 vs 30), a gap that shows most in low-lit rooms.
Agreeable Gray reflects far more light (LRV 60 vs 38), opening up a space where Cosmos encloses it.
At LRV 58 vs 38, Accessible Beige is decisively the brighter choice.
A 11-point LRV gap (38 vs 27) makes Cosmos the marginally brighter of the two.
French Gray reads slightly lighter (LRV 43 vs 38), a gap that shows most in low-lit rooms.
At LRV 55 vs 38, Tranquil Dawn is decisively the brighter choice.
A 6-point LRV gap (44 vs 38) makes Hardwick White the marginally brighter of the two.
Pure White reflects far more light (LRV 84 vs 38), opening up a space where Cosmos encloses it.
At LRV 66 vs 38, Balboa Mist is decisively the brighter choice.
At LRV 74 vs 38, Shoji White is decisively the brighter choice.
At LRV 38 vs 12, Cosmos is decisively the brighter choice.
At LRV 68 vs 38, Skimming Stone is decisively the brighter choice.
At LRV 38 vs 12, Cosmos is decisively the brighter choice.
A 8-point LRV gap (45 vs 38) makes Saybrook Sage the marginally brighter of the two.
Cosmos reads slightly lighter (LRV 38 vs 31), a gap that shows most in low-lit rooms.
Cosmos reflects far more light (LRV 38 vs 7), opening up a space where Pine Needle encloses it.
Cosmos reflects far more light (LRV 38 vs 24), opening up a space where Cement grey encloses it.
Guilford Green reflects far more light (LRV 57 vs 38), opening up a space where Cosmos encloses it.