Buttermilk vs Grey Blue
Buttermilk (Dulux) and Grey Blue (RAL Classic) come from different manufacturers. Hue-wise, Buttermilk belongs to the beige family and Grey Blue to the blue-grey family. The 70-point LRV gap — 77 for Buttermilk vs 7 for Grey Blue — means Buttermilk will open up a space more effectively. A ΔE of 62.9 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.
Buttermilk vs Grey Blue in Real Spaces
2 real rooms side by side. Seeing Buttermilk and Grey Blue 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. Buttermilk returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
House
A full exterior is the most demanding test for a paint color — scale and outdoor light both amplify differences that seem small on a swatch. Buttermilk returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
Color Details
Buttermilk vs Grey Blue Simulated Comparison
5 simulated room previews — drag the slider on each to see Buttermilk on one side and Grey Blue 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 Buttermilk comparisons
See how Buttermilk stacks up against other well-photographed colors across different brands and tones.
