RAL 540-5 vs Thames Fog
RAL 540-5 (RAL Effect) and Thames Fog (Valspar) come from different manufacturers. Hue-wise, RAL 540-5 belongs to the pink-purple family and Thames Fog to the grey family. The 14-point LRV gap — 27 for Thames Fog vs 13 for RAL 540-5 — means Thames Fog will open up a space more effectively. A ΔE of 40.0 puts these firmly in different territory — two distinct design choices rather than close alternatives. Below you'll find 2 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
RAL 540-5 vs Thames Fog in Real Spaces
2 real rooms side by side. Seeing RAL 540-5 and Thames Fog 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
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. Thames Fog reflects noticeably more light off the walls, making the space read more open than RAL 540-5.
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. Thames Fog returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
Color Details
RAL 540-5 vs Thames Fog Simulated Comparison
5 simulated room previews — drag the slider on each to see RAL 540-5 on one side and Thames Fog 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 RAL 540-5 comparisons
See how RAL 540-5 stacks up against other well-photographed colors across different brands and tones.
