Blue Square vs RAL 660-M
Blue Square is a Behr color while RAL 660-M comes from RAL Effect. Both sit in the blue family, which is useful context if you're narrowing within a single hue direction. At LRV 24 vs 20, RAL 660-M will read as the brighter of the two — a 4-point gap that matters most in north-facing or low-light rooms. At ΔE 5.1, the difference is perceptible but not dramatic — the two can work harmoniously in the same space. Below you'll find 6 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Blue Square vs RAL 660-M in Real Spaces
6 real rooms side by side. Blue Square and RAL 660-M 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.
Living Room
Living rooms test a color across a full range of conditions — morning sun, afternoon shade, and evening lamp light all shift how both of these read. RAL 660-M has the edge in reflectance, which shows as a quiet sense of added space rather than an obvious contrast.
Bedroom
Bedroom walls are often seen under warm artificial light, a context that shifts both colors from how they look on a chip. The brightness difference is modest but present — RAL 660-M gives the walls a little more lift.
Kitchen
Kitchen lighting tends to be bright and directional, which sharpens contrast and makes undertone differences more apparent. The brightness difference is modest but present — RAL 660-M gives the walls a little more lift.
Bathroom
Bathrooms amplify color — the enclosed space and reflective surfaces make what reads subtle elsewhere feel more present here. The brightness difference is modest but present — RAL 660-M gives the walls a little more lift.
House
At full exterior scale, the difference between these two colors becomes much easier to judge than from a small chip. The brightness difference is modest but present — RAL 660-M gives the walls a little more lift.
Kitchen Cabinets
On cabinetry, undertone and temperature become more pronounced against countertops and hardware. The brightness difference is modest but present — RAL 660-M gives the walls a little more lift.
Color Details
Blue Square vs RAL 660-M Simulated Comparison
5 simulated room previews — drag the slider on each to see Blue Square on one side and RAL 660-M 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 Blue Square comparisons
See how Blue Square stacks up against other well-photographed colors across different brands and tones.
At LRV 69 vs 20, Ammonite is decisively the brighter choice.
White Dove reflects far more light (LRV 83 vs 20), opening up a space where Blue Square encloses it.
Blue Square reflects far more light (LRV 20 vs 6), opening up a space where Iron Ore encloses it.
At LRV 52 vs 20, Purbeck Stone is decisively the brighter choice.
A 11-point LRV gap (30 vs 20) makes Evergreen Fog the marginally brighter of the two.
Mizzle reflects far more light (LRV 52 vs 20), opening up a space where Blue Square encloses it.
At LRV 60 vs 20, Agreeable Gray is decisively the brighter choice.
Accessible Beige reflects far more light (LRV 58 vs 20), opening up a space where Blue Square encloses it.
Denim Drift reads slightly lighter (LRV 27 vs 20), a gap that shows most in low-lit rooms.
At LRV 43 vs 20, French Gray is decisively the brighter choice.
At LRV 20 vs 4, Blue Square is decisively the brighter choice.
Tranquil Dawn reflects far more light (LRV 55 vs 20), opening up a space where Blue Square encloses it.
Blue Square reads slightly lighter (LRV 20 vs 13), a gap that shows most in low-lit rooms.
Hardwick White reflects far more light (LRV 44 vs 20), opening up a space where Blue Square encloses it.
At LRV 84 vs 20, Pure White is decisively the brighter choice.
Their light reflectance is nearly identical (LRV 21 vs 20), so neither reads brighter in a room.
Balboa Mist reflects far more light (LRV 66 vs 20), opening up a space where Blue Square encloses it.
Shoji White reflects far more light (LRV 74 vs 20), opening up a space where Blue Square encloses it.
Snowbound reflects far more light (LRV 83 vs 20), opening up a space where Blue Square encloses it.
At LRV 51 vs 20, Pigeon is decisively the brighter choice.
Blue Square reads slightly lighter (LRV 20 vs 12), a gap that shows most in low-lit rooms.
Blue Square reads slightly lighter (LRV 20 vs 8), a gap that shows most in low-lit rooms.
Skimming Stone reflects far more light (LRV 68 vs 20), opening up a space where Blue Square encloses it.
At LRV 41 vs 20, Dix Blue is decisively the brighter choice.
Blue Square reads slightly lighter (LRV 20 vs 12), a gap that shows most in low-lit rooms.
Saybrook Sage reflects far more light (LRV 45 vs 20), opening up a space where Blue Square encloses it.
A 11-point LRV gap (31 vs 20) makes Pale Green the marginally brighter of the two.