Cay vs Rapture Blue
Both from Sherwin-Williams's palette. These are both blues, so the question isn't which hue to choose — it's where within blue to land. Cay (LRV 58) reflects noticeably more light than Rapture Blue (LRV 47), a difference of 11 points that becomes especially apparent in rooms with limited natural light. Both lean cool, so they'll behave similarly in mixed or changing light conditions. With a ΔE of 10.3, the contrast is hard to miss. These aren't variations on a theme — they're two different answers to the same question. Below you'll find 3 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Cay vs Rapture Blue in Real Spaces
3 real rooms side by side. Seeing Cay and Rapture Blue in actual rooms makes the difference concrete; browse the spaces below to get a feel for how each color lives on a wall.
Bathroom
Bathrooms are one of the few spaces where you're genuinely enclosed by the paint color, which makes the choice between these two more consequential. Cay reflects noticeably more light off the walls, making the space read more open than Rapture Blue.
House
Seen across an entire facade, subtle tonal differences become pronounced. What reads as nearly the same on a chip often reads as clearly different at scale. Cay reflects noticeably more light off the walls, making the space read more open than Rapture Blue.
Front Door
A front door is a focal point — small color differences read clearly at this concentrated scale. The LRV gap is large enough that Cay will make the room feel meaningfully brighter than Rapture Blue would.
Color Details
Cay vs Rapture Blue Simulated Comparison
5 simulated room previews — drag the slider on each to see Cay on one side and Rapture Blue 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 Cay comparisons
See how Cay stacks up against other well-photographed colors across different brands and tones.
White Dove reflects far more light (LRV 83 vs 58), opening up a space where Cay encloses it.
A 6-point LRV gap (58 vs 52) makes Cay the marginally brighter of the two.
Their light reflectance is nearly identical (LRV 60 vs 58), so neither reads brighter in a room.
With LRVs of 58 and 58, the two reflect almost the same amount of light.
Cay reflects far more light (LRV 58 vs 27), opening up a space where Denim Drift encloses it.
Cay reads slightly lighter (LRV 58 vs 55), a gap that shows most in low-lit rooms.
Cay reflects far more light (LRV 58 vs 44), opening up a space where Hardwick White encloses it.
At LRV 84 vs 58, Pure White is decisively the brighter choice.
Balboa Mist reads slightly lighter (LRV 66 vs 58), a gap that shows most in low-lit rooms.
Shoji White reflects far more light (LRV 74 vs 58), opening up a space where Cay encloses it.
Cay reflects far more light (LRV 58 vs 12), opening up a space where Pewter Green encloses it.
Skimming Stone reads slightly lighter (LRV 68 vs 58), a gap that shows most in low-lit rooms.
Cay reflects far more light (LRV 58 vs 12), opening up a space where Vintage Vogue encloses it.
Cay reflects far more light (LRV 58 vs 45), opening up a space where Saybrook Sage encloses it.
At LRV 58 vs 31, Cay is decisively the brighter choice.
At LRV 58 vs 24, Cay is decisively the brighter choice.
Their light reflectance is nearly identical (LRV 58 vs 57), so neither reads brighter in a room.