Just Walnut vs RAL 640-4
Just Walnut is a Dulux color while RAL 640-4 comes from RAL Effect. Hue-wise, Just Walnut belongs to the beige-greige family and RAL 640-4 to the blue family. At LRV 72 vs 7, Just Walnut will read as the brighter of the two — a 65-point gap that matters most in north-facing or low-light rooms. At ΔE 62.3, these are genuinely distinct colors — a strong contrast if used together, or a meaningful choice between two different directions. Below you'll find 4 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Just Walnut vs RAL 640-4 in Real Spaces
4 real rooms side by side. Seeing Just Walnut and RAL 640-4 in actual rooms makes the difference concrete; browse the spaces below to get a feel for how each color lives on a wall.
Bedroom
Bedroom walls are often seen under warm artificial light, a context that shifts both colors from how they look on a chip. The LRV gap is large enough that Just Walnut will make the room feel meaningfully brighter than RAL 640-4 would.
Kitchen
Kitchen lighting tends to be bright and directional, which sharpens contrast and makes undertone differences more apparent. The LRV gap is large enough that Just Walnut will make the room feel meaningfully brighter than RAL 640-4 would.
Bathroom
Bathrooms amplify color — the enclosed space and reflective surfaces make what reads subtle elsewhere feel more present here. The LRV gap is large enough that Just Walnut will make the room feel meaningfully brighter than RAL 640-4 would.
Kitchen Cabinets
On cabinetry, undertone and temperature become more pronounced against countertops and hardware. The LRV gap is large enough that Just Walnut will make the room feel meaningfully brighter than RAL 640-4 would.
Color Details
Just Walnut vs RAL 640-4 Simulated Comparison
5 simulated room previews — drag the slider on each to see Just Walnut on one side and RAL 640-4 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 Just Walnut comparisons
See how Just Walnut stacks up against other well-photographed colors across different brands and tones.
