Lamp Black vs RAL 640-4
Lamp Black (Little Greene) and RAL 640-4 (RAL Effect) come from different manufacturers. Hue-wise, Lamp Black belongs to the grey family and RAL 640-4 to the blue family. The 4-point LRV gap — 7 for RAL 640-4 vs 3 for Lamp Black — means RAL 640-4 will open up a space more effectively. A ΔE of 37.7 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.
Lamp Black vs RAL 640-4 in Real Spaces
4 real rooms side by side. Seeing Lamp Black 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
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 640-4 has the edge in reflectance, which shows as a quiet sense of added space rather than an obvious contrast.
Kitchen
Kitchens often have the harshest, most revealing light in the house — under-cabinet LEDs and overhead fixtures that strip away subtlety. RAL 640-4 has the edge in reflectance, which shows as a quiet sense of added space rather than an obvious contrast.
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 640-4 has the edge in reflectance, which shows as a quiet sense of added space rather than an obvious contrast.
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 640-4 has the edge in reflectance, which shows as a quiet sense of added space rather than an obvious contrast.
Color Details
Lamp Black vs RAL 640-4 Simulated Comparison
5 simulated room previews — drag the slider on each to see Lamp Black 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 Lamp Black comparisons
See how Lamp Black stacks up against other well-photographed colors across different brands and tones.
