ColorplanCook's Blue
No.237 · Farrow & Ball
LRV 26 · dark
0 black100 white
Farrow & Ball Cook's Blue (No.237) is a deep blue with a cool blue undertone and an LRV of 26. Closest matches: Benjamin Moore Mariner's Tale (CC-876). For trim, try Sizing (No.314).
Room Preview
This photo shows walls only. Photos show the color in a real room's light; your own light will change it.
Suggested trim and ceiling are Farrow & Ball whites that share this color's undertone.
Color Details
| Family | Blue |
| LRV | 25.9 (dark; 0 = black, 100 = pure white) |
| HEX | #6A8FB2 |
| RGB | 106, 143, 178 |
| HSL | 209°, 32%, 56% |
About Cook's Blue
Cook's Blue (No.237) is a deep, medium-strength blue from Farrow & Ball. With an LRV of 26, Cook's Blue absorbs more light than it reflects, so it works best in rooms with good natural light or where you want a cozier feel.
North-facing light makes Cook's Blue read cooler and slightly darker, while warm south-facing light softens it. It's a good fit for bedrooms, offices, kitchen islands and cabinets and accent walls. Next to Chinese Blue (No.90), it's cooler and more colorful.
How Cook's Blue changes with the light
Cook's Blue has a cool undertone. North light will push it cooler and grayer, while south and west light warm it up. If your room faces north, look at it next to a warm white trim.
North-facing rooms
Cook's Blue has a cool undertone that north light will push cooler and grayer; warm white trim helps balance it.
East-facing rooms
Cook's Blue will look warmer and brighter in the morning and cooler and grayer by afternoon; check a sample at both times.
South-facing rooms
Bright south light shows Cook's Blue close to its true color, slightly lighter and warmer.
West-facing rooms
Cook's Blue looks cool in the morning and warms up in the golden late-afternoon light.
See Cook's Blue in real homes
Photos people have shared of Cook's Blue in their own rooms. Opens Instagram or Pinterest in a new tab.
Cook's Blue equivalents in other brands
The closest color from each brand. ΔE (“delta E”) scores how different two colors look: under 2.5 is very hard to tell apart on a wall, over 5 is clearly different.
Benjamin Moore
Very close · ΔE 1.5
Also close: Blue Dragon (ΔE 1.5)
Compare side by side →Sherwin-Williams
Closest available · ΔE 6.8
Also close: Daphne (ΔE 8.7)
Compare side by side →Behr
Closest available · ΔE 5.7
Also close: Adirondack Blue (ΔE 9.4)
Compare side by side →Similar Farrow & Ball colors
Cook's Blue questions
What undertone does Cook's Blue have?
Cook's Blue has a cool blue undertone, so it reads as a cool color. North-facing light makes Cook's Blue read cooler and slightly darker, while warm south-facing light softens it.
Is Cook's Blue a light or dark color?
Cook's Blue has a light reflectance value (LRV) of 25.9 on a scale where 0 is black and 100 is pure white, which makes it a deep color. With an LRV of 26, Cook's Blue absorbs more light than it reflects, so it works best in rooms with good natural light or where you want a cozier feel.
What is the closest match to Cook's Blue in other paint brands?
Benjamin Moore: Mariner's Tale CC-876 (very close, ΔE 1.5); Sherwin-Williams: Bracing Blue SW 6242 (closest available, ΔE 6.8); Behr: Jean Jacket Blue S510-4 (closest available, ΔE 5.7). Matches are calculated with the CIEDE2000 color difference formula; always check a physical sample before buying.
What trim and ceiling color goes with Cook's Blue?
Try Sizing (No.314) on trim and Wevet (No.273) on the ceiling. Both are Farrow & Ball whites that share Cook's Blue's undertone.
Where does Cook's Blue work best?
Cook's Blue works well in bedrooms, offices, kitchen islands and cabinets and accent walls. With an LRV of 26, Cook's Blue absorbs more light than it reflects, so it works best in rooms with good natural light or where you want a cozier feel.
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