Honest Indigo vs Ultramarine blue
Honest Indigo (Dulux) and Ultramarine blue (RAL Classic) come from different manufacturers. Both sit in the blue family, which is useful context if you're narrowing within a single hue direction. Their light reflectance values are nearly the same — 7 vs 7 — so neither will read significantly brighter or darker than the other. ΔE 5.3 means they're clearly different, but not dramatically so — they'd pair well in the same room. Below, 5 simulated room previews show how each color reads at scale — real-room photos will be added as they become available.
Color Details
Honest Indigo vs Ultramarine blue Simulated Comparison
5 simulated room previews — drag the slider on each to see Honest Indigo on one side and Ultramarine blue 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 Honest Indigo comparisons
See how Honest Indigo stacks up against other well-photographed colors across different brands and tones.
