Celestial Blue vs Functional Gray
Where Celestial Blue belongs to Little Greene's range, Functional Gray is a Sherwin-Williams color. Hue-wise, Celestial Blue belongs to the blue-green family and Functional Gray to the greige-grey family. Celestial Blue (LRV 44) reflects noticeably more light than Functional Gray (LRV 37), a difference of 7 points that becomes especially apparent in rooms with limited natural light. Celestial Blue runs green while Functional Gray is decidedly warm, which means they'll respond very differently to warm vs cool light sources. With a ΔE of 10.7, the contrast is hard to miss. These aren't variations on a theme — they're two different answers to the same question. Below you'll find 3 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Celestial Blue vs Functional Gray in Real Spaces
3 real rooms side by side. Seeing Celestial Blue and Functional Gray 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
In a living room, color works across both daylight and evening light — the same wall can read very differently at noon and at 8pm. The brightness difference is modest but present — Celestial Blue gives the walls a little more lift.
Bedroom
The context that matters most in a bedroom is how a color reads under a bedside lamp at night, not under noon daylight. Celestial Blue reads slightly lighter here — a subtle but real difference in how open the space feels.
House
Seen across an entire facade, subtle tonal differences become pronounced. What reads as nearly the same on a chip often reads as clearly different at scale. Celestial Blue reads slightly lighter here — a subtle but real difference in how open the space feels.
Color Details
Celestial Blue vs Functional Gray Simulated Comparison
5 simulated room previews — drag the slider on each to see Celestial Blue on one side and Functional Gray 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 Celestial Blue comparisons
See how Celestial Blue stacks up against other well-photographed colors across different brands and tones.
