Cook's Blue vs Lupine
Where Cook's Blue belongs to Farrow & Ball's range, Lupine is a Sherwin-Williams color. These are both blues, so the question isn't which hue to choose — it's where within blue to land. Cook's Blue (LRV 25) reflects noticeably more light than Lupine (LRV 16), a difference of 9 points that becomes especially apparent in rooms with limited natural light. Both lean cool, so they'll behave similarly in mixed or changing light conditions. With a ΔE of 12.3, 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 1 real-room photo comparison where both colors appear side by side, plus 5 simulated room previews.
Cook's Blue vs Lupine in Real Spaces
1 real room side by side. Seeing Cook's Blue and Lupine in actual rooms makes the difference concrete; browse the spaces below to get a feel for how each color lives on a wall.
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 Lupine would.
Color Details
Cook's Blue vs Lupine Simulated Comparison
5 simulated room previews — drag the slider on each to see Cook's Blue on one side and Lupine 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.
