Gustavian Blue vs RAL 170-2
Gustavian Blue is a Jotun color while RAL 170-2 comes from RAL Effect. Hue-wise, Gustavian Blue belongs to the blue-grey family and RAL 170-2 to the blue family. At LRV 42 vs 38, RAL 170-2 will read as the brighter of the two — a 3-point gap that matters most in north-facing or low-light rooms. At ΔE 4.8, the difference is perceptible but not dramatic — the two can work harmoniously in the same space. Below you'll find 2 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Gustavian Blue vs RAL 170-2 in Real Spaces
2 real rooms side by side. Gustavian Blue and RAL 170-2 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.
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 170-2 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 170-2 gives the walls a little more lift.
Color Details
Gustavian Blue vs RAL 170-2 Simulated Comparison
5 simulated room previews — drag the slider on each to see Gustavian Blue on one side and RAL 170-2 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 Gustavian Blue comparisons
See how Gustavian Blue stacks up against other well-photographed colors across different brands and tones.
At LRV 69 vs 38, Ammonite is decisively the brighter choice.
White Dove reflects far more light (LRV 83 vs 38), opening up a space where Gustavian Blue encloses it.
Gustavian Blue reflects far more light (LRV 38 vs 6), opening up a space where Iron Ore encloses it.
At LRV 52 vs 38, Purbeck Stone is decisively the brighter choice.
A 8-point LRV gap (38 vs 30) makes Gustavian Blue the marginally brighter of the two.
Mizzle reflects far more light (LRV 52 vs 38), opening up a space where Gustavian Blue encloses it.
At LRV 60 vs 38, Agreeable Gray is decisively the brighter choice.
Accessible Beige reflects far more light (LRV 58 vs 38), opening up a space where Gustavian Blue encloses it.
Gustavian Blue reads slightly lighter (LRV 38 vs 27), a gap that shows most in low-lit rooms.
A 5-point LRV gap (43 vs 38) makes French Gray the marginally brighter of the two.
At LRV 38 vs 4, Gustavian Blue is decisively the brighter choice.
Tranquil Dawn reflects far more light (LRV 55 vs 38), opening up a space where Gustavian Blue encloses it.
Gustavian Blue reflects far more light (LRV 38 vs 13), opening up a space where Bancha encloses it.
Hardwick White reads slightly lighter (LRV 44 vs 38), a gap that shows most in low-lit rooms.
At LRV 84 vs 38, Pure White is decisively the brighter choice.
At LRV 38 vs 21, Gustavian Blue is decisively the brighter choice.
Balboa Mist reflects far more light (LRV 66 vs 38), opening up a space where Gustavian Blue encloses it.
Shoji White reflects far more light (LRV 74 vs 38), opening up a space where Gustavian Blue encloses it.
Snowbound reflects far more light (LRV 83 vs 38), opening up a space where Gustavian Blue encloses it.
At LRV 51 vs 38, Pigeon is decisively the brighter choice.
Gustavian Blue reflects far more light (LRV 38 vs 12), opening up a space where Pewter Green encloses it.
Gustavian Blue reflects far more light (LRV 38 vs 8), opening up a space where Duck Green encloses it.
Skimming Stone reflects far more light (LRV 68 vs 38), opening up a space where Gustavian Blue encloses it.
Their light reflectance is nearly identical (LRV 41 vs 38), so neither reads brighter in a room.
Gustavian Blue reflects far more light (LRV 38 vs 12), opening up a space where Vintage Vogue encloses it.
Saybrook Sage reads slightly lighter (LRV 45 vs 38), a gap that shows most in low-lit rooms.
A 7-point LRV gap (38 vs 31) makes Gustavian Blue the marginally brighter of the two.