Reef Blue vs Guilford Green
Reef Blue (Behr) and Guilford Green (Benjamin Moore) come from different manufacturers. Reef Blue reads as blue, while Guilford Green reads as beige-green — two distinct hue families, not close cousins. The 12-point LRV gap — 57 for Guilford Green vs 45 for Reef Blue — means Guilford Green will open up a space more effectively. Where Reef Blue leans blue, Guilford Green reads yellow — a distinction that shifts noticeably depending on the light source and surrounding finishes. A ΔE of 30.0 puts these firmly in different territory — two distinct design choices rather than close alternatives. Below you'll find 6 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Reef Blue vs Guilford Green in Real Spaces
6 real rooms side by side. Seeing Reef Blue and Guilford Green 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. Guilford Green reflects noticeably more light off the walls, making the space read more open than Reef Blue.
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. Guilford Green returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
Kitchen
Kitchens often have the harshest, most revealing light in the house — under-cabinet LEDs and overhead fixtures that strip away subtlety. Guilford Green returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
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. Guilford Green returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
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. Guilford Green returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
Kitchen Cabinets
Cabinet color is always seen in context — against countertops, backsplash, and hardware — which amplifies undertone differences that might disappear on a plain wall. Guilford Green returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
Color Details
Reef Blue vs Guilford Green Simulated Comparison
5 simulated room previews — drag the slider on each to see Reef Blue on one side and Guilford 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 Reef Blue comparisons
See how Reef Blue stacks up against other well-photographed colors across different brands and tones.
At LRV 83 vs 45, White Dove is decisively the brighter choice.
Purbeck Stone reads slightly lighter (LRV 52 vs 45), a gap that shows most in low-lit rooms.
Reef Blue reflects far more light (LRV 45 vs 30), opening up a space where Evergreen Fog encloses it.
Agreeable Gray reflects far more light (LRV 60 vs 45), opening up a space where Reef Blue encloses it.
At LRV 58 vs 45, Accessible Beige is decisively the brighter choice.
At LRV 45 vs 27, Reef Blue is decisively the brighter choice.
With LRVs of 45 and 43, the two reflect almost the same amount of light.
A 10-point LRV gap (55 vs 45) makes Tranquil Dawn the marginally brighter of the two.
Their light reflectance is nearly identical (LRV 45 vs 44), so neither reads brighter in a room.
Pure White reflects far more light (LRV 84 vs 45), opening up a space where Reef Blue encloses it.
At LRV 66 vs 45, Balboa Mist is decisively the brighter choice.
At LRV 74 vs 45, Shoji White is decisively the brighter choice.
At LRV 45 vs 12, Reef Blue is decisively the brighter choice.
At LRV 68 vs 45, Skimming Stone is decisively the brighter choice.
At LRV 45 vs 12, Reef Blue is decisively the brighter choice.
Their light reflectance is nearly identical (LRV 45 vs 45), so neither reads brighter in a room.
Reef Blue reflects far more light (LRV 45 vs 31), opening up a space where Pale Green encloses it.
Reef Blue reflects far more light (LRV 45 vs 7), opening up a space where Pine Needle encloses it.
Reef Blue reflects far more light (LRV 45 vs 24), opening up a space where Cement grey encloses it.
Just Walnut reflects far more light (LRV 72 vs 45), opening up a space where Reef Blue encloses it.