Undine vs Celestial Blue
Undine is a Behr color while Celestial Blue comes from Little Greene. Undine reads as blue, while Celestial Blue reads as blue-green — two distinct hue families, not close cousins. With LRVs of 43 and 44, they'll behave almost identically in terms of how much light they reflect back into a room. The tonal difference — Undine's green and blue character against Celestial Blue's green — becomes most visible against white trim or in morning light. At ΔE 13.2, these are genuinely distinct colors — a strong contrast if used together, or a meaningful choice between two different directions. Below you'll find 3 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Undine vs Celestial Blue in Real Spaces
3 real rooms side by side. Seeing Undine and Celestial Blue in actual rooms makes the difference concrete; browse the spaces below to get a feel for how each color lives on a wall.
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. At this scale, the choice between them becomes clear in a way that a swatch alone can't communicate.
Bedroom
Bedroom walls are often seen under warm artificial light, a context that shifts both colors from how they look on a chip. Side by side like this, the difference is easy to read — which is exactly why seeing them in a real space is more useful than comparing chips.
House
At full exterior scale, the difference between these two colors becomes much easier to judge than from a small chip. Side by side like this, the difference is easy to read — which is exactly why seeing them in a real space is more useful than comparing chips.
Color Details
Undine vs Celestial Blue Simulated Comparison
5 simulated room previews — drag the slider on each to see Undine 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 Undine comparisons
See how Undine stacks up against other well-photographed colors across different brands and tones.
