Sea Urchin 3 vs Celestial Blue
Sea Urchin 3 is a Dulux color while Celestial Blue comes from Little Greene. Hue-wise, Sea Urchin 3 belongs to the blue family and Celestial Blue to the blue-green family. At LRV 44 vs 40, Celestial Blue will read as the brighter of the two — a 4-point gap that matters most in north-facing or low-light rooms. The tonal difference — Sea Urchin 3's cool character against Celestial Blue's green — becomes most visible against white trim or in morning light. At ΔE 7.2, 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.
Sea Urchin 3 vs Celestial Blue in Real Spaces
2 real rooms side by side. Sea Urchin 3 and Celestial Blue 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. Celestial Blue 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 — Celestial Blue gives the walls a little more lift.
Color Details
Sea Urchin 3 vs Celestial Blue Simulated Comparison
5 simulated room previews — drag the slider on each to see Sea Urchin 3 on one side and Celestial 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 Sea Urchin 3 comparisons
See how Sea Urchin 3 stacks up against other well-photographed colors across different brands and tones.
