Skimming Stone
Farrow & Ball · No. 241A warm off-white, neither yellow nor gray, that warms a room without dating it.
Ma Bible DécoTHE MANUAL · 2026 EDITIONTHE APPROACH
The manual of interior design.
Everything interior designers know, explained simply. 114 rules, 10 chapters, real numbers, real examples. Plus an AI that audits your room from a single photo.
The foundations
01 — 03The three rules to remember.
★ THIS WEEK'S RULE
01.1 — Color & Paint
The 60/30/10 rule
The simplest, most effective formula in all of interior design. From the Bauhaus to Pierre Yovanovitch.
Difficulty
Easy
Budget
$0
Time
30 min
Impact
★★★★★
TODAY'S PALETTE
Earth, linen, ink.
Three tones that speak to each other without competing. A neutral foundation, an earthy warmth, a deep accent.
You'll find this palette in a Pierre Yovanovitch interior, in a Marrakech riad, or in a Brooklyn brownstone. The logic comes in three moves. A neutral ground that lets the light breathe. A desaturated terracotta that warms without shouting. A deep blue that anchors the eye, in very small doses.
None of these three tones is trendy. They'll still hold up in ten years.
DOMINANT 60%
SECONDARY 30%
ACCENT 10%
Red Earth
Farrow & Ball · No. 64A soft, warm terracotta with clay undertones that warms a room without turning orange.
Hague Blue
Farrow & Ball · No. 30A deep, near-black navy that anchors the eye without weighing down the room.
THE TOOLS
Calculate, stop guessing.
The right décor measurements in seconds. Five free tools that turn the manual's rules into numbers for your room.
- 01
Rug size calculator
The right size for your sofa, bed or table.
- 02
Sofa-to-TV distance calculator
The ideal viewing distance for your screen size.
- 03
Pendant light height calculator
The right height above a table, island or in an entryway.
- 04
Picture hanging height calculator
The right height, on a bare wall or above furniture.
- 05
60/30/10 palette generator
One dominant, we derive the secondary and accent.
- The toolsOpen the tool
AI MODULE · OPEN BETA
One photo. One diagnosis. Three corrections.
Photograph any room, our AI analyzes it against the 114 rules of the manual. It flags palette imbalances, proportion mistakes, and the most common lighting errors. Then sends you straight to the rules that will fix them this weekend.
01
Detection of the main mistakes
02
Three tips for an immediate gain
03
Direct links to the relevant rules
Free, no signup required. Photo analyzed in under a minute.
TO AVOID
The worst mistakes.
The errors that ruin a room, even when everything else is right.
See all 8 mistakesTO ADOPT
Pro tips.
Hacks, IKEA tweaks, thrifting. Twenty practical tips to apply the manual without renovating.
- 01Hide electrical cables→
- 02Build a personalised IKEA Pax wardrobe→
- 03The perfect reading nook for £150→
THE BULLETIN
One rule, every Tuesday.
Nothing more.
Each week, one design rule explained in full. No Pinterest, no noise, no filler. Four minutes of reading on Tuesday morning.