Rosemary Leaf vs Celestial Blue
Rosemary Leaf (Dulux) and Celestial Blue (Little Greene) come from different manufacturers. These are both blue-greens, so the question isn't which hue to choose — it's where within blue-green to land. The 4-point LRV gap — 44 for Celestial Blue vs 40 for Rosemary Leaf — means Celestial Blue will open up a space more effectively. Where Rosemary Leaf leans cool, Celestial Blue reads green — a distinction that shifts noticeably depending on the light source and surrounding finishes. ΔE 4.5 means they're clearly different, but not dramatically so — they'd pair well in the same room. Below you'll find 3 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Rosemary Leaf vs Celestial Blue in Real Spaces
3 real rooms side by side. Rosemary Leaf 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
A living room wall sees more varied light than almost any other surface in the house, which makes the choice between these two more nuanced than a chip suggests. Celestial Blue reads slightly lighter here — a subtle but real difference in how open the space feels.
Bedroom
Bedrooms are typically lit with warmer, lower light than the rest of the house — a condition that flatters warm tones and deepens cool ones. Celestial Blue has the edge in reflectance, which shows as a quiet sense of added space rather than an obvious contrast.
House
A full exterior is the most demanding test for a paint color — scale and outdoor light both amplify differences that seem small on a swatch. Celestial Blue has the edge in reflectance, which shows as a quiet sense of added space rather than an obvious contrast.
Color Details
Rosemary Leaf vs Celestial Blue Simulated Comparison
5 simulated room previews — drag the slider on each to see Rosemary Leaf 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 Rosemary Leaf comparisons
See how Rosemary Leaf stacks up against other well-photographed colors across different brands and tones.
