Celestial Blue vs Cement grey
Celestial Blue (Little Greene) and Cement grey (RAL Classic) come from different manufacturers. Celestial Blue reads as blue-green, while Cement grey reads as grey — two distinct hue families, not close cousins. The 20-point LRV gap — 44 for Celestial Blue vs 24 for Cement grey — means Celestial Blue will open up a space more effectively. A ΔE of 19.8 puts these firmly in different territory — two distinct design choices rather than close alternatives. Below you'll find 4 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Celestial Blue vs Cement grey in Real Spaces
4 real rooms side by side. Seeing Celestial 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
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. Celestial Blue reflects noticeably more light off the walls, making the space read more open than Cement grey.
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. Celestial Blue 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. Celestial Blue returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
Front Door
On a front door, the color is both the first and last thing you see — a context where even a modest tonal difference reads clearly. Celestial Blue reflects noticeably more light off the walls, making the space read more open than Cement grey.
Color Details
Celestial Blue vs Cement grey Simulated Comparison
5 simulated room previews — drag the slider on each to see Celestial 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 Celestial Blue comparisons
See how Celestial Blue stacks up against other well-photographed colors across different brands and tones.
At LRV 83 vs 44, White Dove is decisively the brighter choice.
Ammonite reflects far more light (LRV 69 vs 44), opening up a space where Celestial Blue encloses it.
At LRV 44 vs 6, Celestial Blue is decisively the brighter choice.
Purbeck Stone reads slightly lighter (LRV 52 vs 44), a gap that shows most in low-lit rooms.
Celestial Blue reflects far more light (LRV 44 vs 30), opening up a space where Evergreen Fog encloses it.
A 8-point LRV gap (52 vs 44) makes Mizzle the marginally brighter of the two.
Agreeable Gray reflects far more light (LRV 60 vs 44), opening up a space where Celestial Blue encloses it.
At LRV 58 vs 44, Accessible Beige is decisively the brighter choice.
At LRV 44 vs 27, Celestial Blue is decisively the brighter choice.
With LRVs of 44 and 43, the two reflect almost the same amount of light.
Celestial Blue reflects far more light (LRV 44 vs 4), opening up a space where Naval encloses it.
A 11-point LRV gap (55 vs 44) makes Tranquil Dawn the marginally brighter of the two.
At LRV 44 vs 13, Celestial Blue is decisively the brighter choice.
Their light reflectance is nearly identical (LRV 44 vs 44), so neither reads brighter in a room.
Pure White reflects far more light (LRV 84 vs 44), opening up a space where Celestial Blue encloses it.
Celestial Blue reflects far more light (LRV 44 vs 21), opening up a space where Artichoke encloses it.
At LRV 66 vs 44, Balboa Mist is decisively the brighter choice.
At LRV 74 vs 44, Shoji White is decisively the brighter choice.
At LRV 83 vs 44, Snowbound is decisively the brighter choice.
At LRV 44 vs 12, Celestial Blue is decisively the brighter choice.
At LRV 68 vs 44, Skimming Stone is decisively the brighter choice.
Celestial Blue reads slightly lighter (LRV 44 vs 41), a gap that shows most in low-lit rooms.
Calamine reflects far more light (LRV 68 vs 44), opening up a space where Celestial Blue encloses it.
Celestial Blue reflects far more light (LRV 44 vs 25), opening up a space where Treron encloses it.
At LRV 44 vs 12, Celestial Blue is decisively the brighter choice.
Their light reflectance is nearly identical (LRV 45 vs 44), so neither reads brighter in a room.
Celestial Blue reflects far more light (LRV 44 vs 31), opening up a space where Pale Green encloses it.
Celestial Blue reflects far more light (LRV 44 vs 7), opening up a space where Pine Needle encloses it.
Guilford Green reflects far more light (LRV 57 vs 44), opening up a space where Celestial Blue encloses it.
Just Walnut reflects far more light (LRV 72 vs 44), opening up a space where Celestial Blue encloses it.