Portsmouth vs Rookwood Blue Green
Both from Sherwin-Williams's palette. Hue-wise, Portsmouth belongs to the blue-grey family and Rookwood Blue Green to the blue-green family. They have nearly identical light reflectance values (22 vs 22), so they'll read as similarly Medium in most lighting conditions. Both lean neutral, so they'll behave similarly in mixed or changing light conditions. The ΔE 6.0 gap is real but not dramatic — close enough to use together, distinct enough to matter as a choice. Below you'll find 1 real-room photo comparison where both colors appear side by side, plus 5 simulated room previews.
Portsmouth vs Rookwood Blue Green in Real Spaces
1 real room side by side. Portsmouth and Rookwood Blue Green 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.
Bedroom
The context that matters most in a bedroom is how a color reads under a bedside lamp at night, not under noon daylight. The distinction reads clearly at room scale, making the choice between them concrete.
Color Details
Portsmouth vs Rookwood Blue Green Simulated Comparison
5 simulated room previews — drag the slider on each to see Portsmouth on one side and Rookwood Blue Green 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 Portsmouth comparisons
See how Portsmouth stacks up against other well-photographed colors across different brands and tones.
At LRV 69 vs 22, Ammonite is decisively the brighter choice.
White Dove reflects far more light (LRV 83 vs 22), opening up a space where Portsmouth encloses it.
Portsmouth reflects far more light (LRV 22 vs 6), opening up a space where Iron Ore encloses it.
At LRV 52 vs 22, Purbeck Stone is decisively the brighter choice.
A 8-point LRV gap (30 vs 22) makes Evergreen Fog the marginally brighter of the two.
Mizzle reflects far more light (LRV 52 vs 22), opening up a space where Portsmouth encloses it.
At LRV 60 vs 22, Agreeable Gray is decisively the brighter choice.
Accessible Beige reflects far more light (LRV 58 vs 22), opening up a space where Portsmouth encloses it.
Denim Drift reads slightly lighter (LRV 27 vs 22), a gap that shows most in low-lit rooms.
At LRV 43 vs 22, French Gray is decisively the brighter choice.
At LRV 22 vs 4, Portsmouth is decisively the brighter choice.
Tranquil Dawn reflects far more light (LRV 55 vs 22), opening up a space where Portsmouth encloses it.
Portsmouth reads slightly lighter (LRV 22 vs 13), a gap that shows most in low-lit rooms.
Hardwick White reflects far more light (LRV 44 vs 22), opening up a space where Portsmouth encloses it.
At LRV 84 vs 22, Pure White is decisively the brighter choice.
Their light reflectance is nearly identical (LRV 22 vs 21), so neither reads brighter in a room.
Balboa Mist reflects far more light (LRV 66 vs 22), opening up a space where Portsmouth encloses it.
Shoji White reflects far more light (LRV 74 vs 22), opening up a space where Portsmouth encloses it.
Snowbound reflects far more light (LRV 83 vs 22), opening up a space where Portsmouth encloses it.
At LRV 51 vs 22, Pigeon is decisively the brighter choice.
Portsmouth reads slightly lighter (LRV 22 vs 12), a gap that shows most in low-lit rooms.
Portsmouth reflects far more light (LRV 22 vs 8), opening up a space where Duck Green encloses it.
Skimming Stone reflects far more light (LRV 68 vs 22), opening up a space where Portsmouth encloses it.
At LRV 41 vs 22, Dix Blue is decisively the brighter choice.
Portsmouth reads slightly lighter (LRV 22 vs 12), a gap that shows most in low-lit rooms.
Saybrook Sage reflects far more light (LRV 45 vs 22), opening up a space where Portsmouth encloses it.
A 9-point LRV gap (31 vs 22) makes Pale Green the marginally brighter of the two.