Reef Blue vs Cement grey
Where Reef Blue belongs to Behr's range, Cement grey is a RAL Classic color. Hue-wise, Reef Blue belongs to the blue family and Cement grey to the grey family. Reef Blue (LRV 45) reflects noticeably more light than Cement grey (LRV 24), a difference of 21 points that becomes especially apparent in rooms with limited natural light. With a ΔE of 29.8, 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 5 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Reef Blue vs Cement grey in Real Spaces
5 real rooms side by side. Seeing Reef Blue and Cement grey 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
In a living room, color works across both daylight and evening light — the same wall can read very differently at noon and at 8pm. The LRV gap is large enough that Reef Blue will make the room feel meaningfully brighter than Cement grey would.
Bedroom
The context that matters most in a bedroom is how a color reads under a bedside lamp at night, not under noon daylight. Reef Blue reflects noticeably more light off the walls, making the space read more open than Cement grey.
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. Reef Blue reflects noticeably more light off the walls, making the space read more open than Cement grey.
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. Reef Blue reflects noticeably more light off the walls, making the space read more open than Cement grey.
Kitchen Cabinets
Kitchen cabinets are constantly compared against adjacent materials, which means subtle differences between these two become much more visible. Reef Blue reflects noticeably more light off the walls, making the space read more open than Cement grey.
Color Details
Reef Blue vs Cement grey Simulated Comparison
5 simulated room previews — drag the slider on each to see Reef Blue on one side and Cement grey 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.
