Coastal Grey vs Steel Symphony 5
Both from Dulux's palette. Both sit in the blue-grey family, which is useful context if you're narrowing within a single hue direction. Steel Symphony 5 (LRV 63) reflects noticeably more light than Coastal Grey (LRV 56), a difference of 7 points that becomes especially apparent in rooms with limited natural light. Both lean cool, so they'll behave similarly in mixed or changing light conditions. The ΔE 4.3 gap is real but not dramatic — close enough to use together, distinct enough to matter as a choice. Below you'll find 1 real-room photo comparison where both colors appear side by side, plus 5 simulated room previews.
Coastal Grey vs Steel Symphony 5 in Real Spaces
1 real room side by side. Coastal Grey and Steel Symphony 5 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
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 — Steel Symphony 5 gives the walls a little more lift.
Color Details
Coastal Grey vs Steel Symphony 5 Simulated Comparison
5 simulated room previews — drag the slider on each to see Coastal Grey on one side and Steel Symphony 5 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.
