RAL 840-1 vs Thames Fog
RAL 840-1 (RAL Effect) and Thames Fog (Valspar) come from different manufacturers. Hue-wise, RAL 840-1 belongs to the beige-greige family and Thames Fog to the grey family. The 49-point LRV gap — 77 for RAL 840-1 vs 27 for Thames Fog — means RAL 840-1 will open up a space more effectively. A ΔE of 31.1 puts these firmly in different territory — two distinct design choices rather than close alternatives. Below you'll find 4 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
RAL 840-1 vs Thames Fog in Real Spaces
4 real rooms side by side. Seeing RAL 840-1 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. RAL 840-1 reflects noticeably more light off the walls, making the space read more open than Thames Fog.
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. RAL 840-1 returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
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. RAL 840-1 returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
Kitchen Cabinets
Cabinet color is always seen in context — against countertops, backsplash, and hardware — which amplifies undertone differences that might disappear on a plain wall. RAL 840-1 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 840-1 vs Thames Fog Simulated Comparison
5 simulated room previews — drag the slider on each to see RAL 840-1 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 840-1 comparisons
See how RAL 840-1 stacks up against other well-photographed colors across different brands and tones.
