Coastal Grey vs Tranquil Dawn
Coastal Grey and Tranquil Dawn come from the same Dulux collection. Hue-wise, Coastal Grey belongs to the blue-grey family and Tranquil Dawn to the green-grey family. Their light reflectance values are nearly the same — 56 vs 55 — so neither will read significantly brighter or darker than the other. Where Coastal Grey leans cool, Tranquil Dawn reads neutral — a distinction that shifts noticeably depending on the light source and surrounding finishes. ΔE 8.6 means they're clearly different, but not dramatically so — they'd pair well in the same room. Below you'll find 2 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Coastal Grey vs Tranquil Dawn in Real Spaces
2 real rooms side by side. Coastal Grey and Tranquil Dawn 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. Tranquil Dawn brings more warmth to the space, while Coastal Grey keeps things cooler and crisper.
Bathroom
Small bathrooms intensify color. A shade that seems quiet in a larger room can feel immersive when you're surrounded by it on four walls. Coastal Grey reads more restrained here, while Tranquil Dawn adds a sense of enclosure and warmth.
Color Details
Coastal Grey vs Tranquil Dawn Simulated Comparison
5 simulated room previews — drag the slider on each to see Coastal Grey on one side and Tranquil Dawn 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 Coastal Grey comparisons
See how Coastal Grey stacks up against other well-photographed colors across different brands and tones.
