Cook's Blue vs Pale Green

Cook's BlueFarrow & BallvsPale GreenRAL ClassicΔE 39.5Very different colors

Where Cook's Blue belongs to Farrow & Ball's range, Pale Green is a RAL Classic color. Hue-wise, Cook's Blue belongs to the blue family and Pale Green to the green family. Pale Green (LRV 31) reflects noticeably more light than Cook's Blue (LRV 25), a difference of 6 points that becomes especially apparent in rooms with limited natural light. With a ΔE of 39.5, 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 6 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.

Cook's Blue vs Pale Green in Real Spaces

6 real rooms side by side. Seeing Cook's Blue and Pale Green in actual rooms makes the difference concrete; browse the spaces below to get a feel for how each color lives on a wall.

Living Room

In a living room, color works across both daylight and evening light — the same wall can read very differently at noon and at 8pm. The brightness difference is modest but present — Pale Green gives the walls a little more lift.

Cook's BlueCook's Blue living room accent wall

@deblauwebeer

Pale GreenRAL Classic Pale Green 6021 living room duplex

@ugodesign_architecture

Bedroom

The context that matters most in a bedroom is how a color reads under a bedside lamp at night, not under noon daylight. Pale Green reads slightly lighter here — a subtle but real difference in how open the space feels.

Cook's BlueCook's Blue bedroom makeover

@anglaurello

Pale GreenRAL Classic Pale Green 6021 bedroom

@holzhaus_wacker

Home Office

The test for a home office color isn't how it looks in a quick glance — it's whether it still feels right after a full day of work. Pale Green reads slightly lighter here — a subtle but real difference in how open the space feels.

Cook's BlueFarrow and Ball Cook's Blue home office photo

@atelierarmbruster

Pale GreenRAL Classic Pale Green 6021 home office

@ege_korkmazlar

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. Pale Green reads slightly lighter here — a subtle but real difference in how open the space feels.

Cook's BlueCook's Blue exterior color

@thepearlmcr

Pale GreenRAL Classic Pale Green 6021 house exterior

@blank_canvas_design_

Front Door

A front door is a focal point — small color differences read clearly at this concentrated scale. The brightness difference is modest but present — Pale Green gives the walls a little more lift.

Cook's BlueFarrow and Ball Cook's Blue front door review

@1930s_homeinhillside

Pale GreenRAL Classic Pale Green 6021 front door

@spieserglueck

Kitchen Cabinets

Kitchen cabinets are constantly compared against adjacent materials, which means subtle differences between these two become much more visible. Pale Green reads slightly lighter here — a subtle but real difference in how open the space feels.

Cook's BlueCook's Blue kitchen cabinets inspiration

@h_u_n_g_r_y_h_o_l_d_i_n_g

Pale GreenRAL Classic Pale Green 6021 kitchen cabinets

@sara_elizagarate

Color Details

Cook's Blue
Farrow & Ball · 237
Hex#6a90b4
LRV25.1
BrandFarrow & Ball
Number237
Undertone
TemperatureCool
BrightnessMedium
Pale Green
RAL Classic · RAL 6021
Hex#8da180
LRV31.2
BrandRAL Classic
NumberRAL 6021
Undertone
Temperature
BrightnessMedium

Cook's Blue vs Pale Green Simulated Comparison

5 simulated room previews — drag the slider on each to see Cook's Blue on one side and Pale Green on the other.

Bathroom
Bedroom
House
Kitchen Cabinets
Living Room

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.

White Dove
Cook's Blue
White Dove
Benjamin Moore
White Dove
LRV 83

White Dove is the lighter choice

Ammonite
Cook's Blue
Ammonite
Farrow & Ball
Ammonite
LRV 69

Ammonite is the lighter choice

Iron Ore
Cook's Blue
Iron Ore
Sherwin-Williams
Iron Ore
LRV 6

Cook's Blue reads noticeably lighter

Purbeck Stone
Cook's Blue
Purbeck Stone
Farrow & Ball
Purbeck Stone
LRV 52

Purbeck Stone is the lighter choice

Evergreen Fog
Cook's Blue
Evergreen Fog
Sherwin-Williams
Evergreen Fog
LRV 30

Evergreen Fog reads slightly lighter

Mizzle
Cook's Blue
Mizzle
Farrow & Ball
Mizzle
LRV 52

Mizzle is the lighter choice

Agreeable Gray
Cook's Blue
Agreeable Gray
Sherwin-Williams
Agreeable Gray
LRV 60

Agreeable Gray is the lighter choice

Denim Drift
Cook's Blue
Denim Drift
Dulux
Denim Drift
LRV 27

Nearly identical in tone

Tranquil Dawn
Cook's Blue
Tranquil Dawn
Dulux
Tranquil Dawn
LRV 55

Tranquil Dawn is the lighter choice

Balboa Mist
Cook's Blue
Balboa Mist
Benjamin Moore
Balboa Mist
LRV 66

Balboa Mist is the lighter choice

Vintage Vogue
Cook's Blue
Vintage Vogue
Benjamin Moore
Vintage Vogue
LRV 12

Cook's Blue reads noticeably lighter

Pine Needle
Cook's Blue
Pine Needle
Dulux
Pine Needle
LRV 7

Cook's Blue reads noticeably lighter

Cement grey
Cook's Blue
Cement grey
RAL ClassicClassic
Cement grey
LRV 24

Nearly identical in tone

Black grey
Cook's Blue
Black grey
RAL ClassicClassic
Black grey
LRV 6

Cook's Blue reads noticeably lighter

Piazza
Cook's Blue
Piazza
Tikkurila
Piazza
LRV 65

Piazza is the lighter choice

Humble Yellow
Cook's Blue
Humble Yellow
Jotun
Humble Yellow
LRV 57

Humble Yellow is the lighter choice

Grey Blue
Cook's Blue
Grey Blue
RAL ClassicClassic
Grey Blue
LRV 7

Cook's Blue reads noticeably lighter

Windmill Lane
Cook's Blue
Windmill Lane
Little Greene
Windmill Lane
LRV 31

Windmill Lane reads slightly lighter

Senses
Cook's Blue
Senses
Jotun
Senses
LRV 41

Senses reads noticeably lighter

Lamp Black
Cook's Blue
Lamp Black
Little Greene
Lamp Black
LRV 3

Cook's Blue reads noticeably lighter

Washed Linen
Cook's Blue
Washed Linen
Jotun
Washed Linen
LRV 55

Washed Linen is the lighter choice

Tea with Florence
Cook's Blue
Tea with Florence
Little Greene
Tea with Florence
LRV 18

Cook's Blue reads slightly lighter

Thames Fog
Cook's Blue
Thames Fog
Valspar
Thames Fog
LRV 27

Nearly identical in tone

Ocean Abyss
Cook's Blue
Ocean Abyss
Behr
Ocean Abyss
LRV 7

Cook's Blue reads noticeably lighter

Classic Silver
Cook's Blue
Classic Silver
Behr
Classic Silver
LRV 48

Classic Silver reads noticeably lighter

Teton Blue
Cook's Blue
Teton Blue
Behr
Teton Blue
LRV 31

Teton Blue reads slightly lighter

RAL 110-2
Cook's Blue
RAL 110-2
RAL EffectEffect
RAL 110-2
LRV 72

RAL 110-2 is the lighter choice

RAL 110-1
Cook's Blue
RAL 110-1
RAL EffectEffect
RAL 110-1
LRV 80

RAL 110-1 is the lighter choice

Paper
Cook's Blue
Paper
Tikkurila
Paper
LRV 88

Paper is the lighter choice

Passageway
Cook's Blue
Passageway
Valspar
Passageway
LRV 14

Cook's Blue reads slightly lighter