Cook's Blue vs Grey Blue
Where Cook's Blue belongs to Farrow & Ball's range, Grey Blue is a RAL Classic color. Cook's Blue reads as blue, while Grey Blue reads as blue-grey — two distinct hue families, not close cousins. Cook's Blue (LRV 25) reflects noticeably more light than Grey Blue (LRV 7), a difference of 18 points that becomes especially apparent in rooms with limited natural light. With a ΔE of 31.0, the contrast is hard to miss. These aren't variations on a theme — they're two different answers to the same question. Below you'll find 4 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Cook's Blue vs Grey Blue in Real Spaces
4 real rooms side by side. Seeing Cook's Blue 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
The context that matters most in a bedroom is how a color reads under a bedside lamp at night, not under noon daylight. Cook's Blue reflects noticeably more light off the walls, making the space read more open than Grey Blue.
House
Seen across an entire facade, subtle tonal differences become pronounced. What reads as nearly the same on a chip often reads as clearly different at scale. Cook's Blue reflects noticeably more light off the walls, making the space read more open than Grey Blue.
Front Door
A front door is a focal point — small color differences read clearly at this concentrated scale. The LRV gap is large enough that Cook's Blue will make the room feel meaningfully brighter than Grey Blue would.
Kitchen Cabinets
Kitchen cabinets are constantly compared against adjacent materials, which means subtle differences between these two become much more visible. Cook's Blue reflects noticeably more light off the walls, making the space read more open than Grey Blue.
Color Details
Cook's Blue vs Grey Blue Simulated Comparison
5 simulated room previews — drag the slider on each to see Cook's Blue 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 Cook's Blue comparisons
See how Cook's Blue stacks up against other well-photographed colors across different brands and tones.
