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.
