The Rule of Thirds: Interior and Fashion Basics

The rule of threes is a famous planning method for style and interiors, but why is this golden number so significant? It has to do with how our brains distinguish patterns. 

As three is the smallest number that registers a combination to help us see visual depth, it allows our eyes to move around to take in a bigger picture, making for a better visual experience. 

Let’s explore why the rule of three is so important and how you can use it. 

What is the rule of thirds?

The Golden Ratio or rule of three has been used for centuries in architecture, interior design, art, photography, fashion and yes, mathematics. It’s based on the concept that things which are grouped in threes are more appealing and give a better visual experience than items in two of fours. 

But why? Our brains are pattern-seekers, always on the lookout for relationships and meaning in the world around us. Three is the smallest number that allows us to create a pattern, which is the perfect combination of brevity and rhythm. It’s a principle derived from the Latin phrase “omne trium perfectum,” which means “everything that comes in threes is perfect” or “every set of three is complete.”

Some examples of this principle are shown in many areas, from Newton’s laws of motion in physics and musical triads to art and photography principles of composition.

So how do we use this principle to decorate our spaces and create fashion looks? 

The rule of thirds in interiors   

In interior design, the aim is to create harmony with satisfying and memorable patterns using odd numbers like three, five, seven, nine, etc. But let’s start with the rule of three, as it’s the simplest way to achieve a harmonious and professional look. 

Furniture

Arranging furniture is a daunting experience for some, but using the rule of three can help turn any space into a decorator’s dream. Try a simple arrangement like an armchair, side table and standing lamp rather than just a chair and a light. In the bedroom, add a piece of artwork above your bed and side table. This already brings in a level of intrigue.

Colour

Get a little creative with your colour combos. Using a colour scheme with just two hues can make a space feel flat and one-dimensional. Adding a third colour, even if it’s only used in decorative ornaments, can help bring a room to life and get your brain buzzing with pattern association. 

As an example, using pastel colours in a bedroom, dusty pink on the walls and white and pink linen can be cheered up with a pop of mustard yellow using scatters or ornaments. The result? An exciting space that still heroes the overall theme with a professional finish.

The rule of thirds in fashion  

Adopting the magic number for three’s into your wardrobe is less complicated, and we guess that you’re already intuitively doing this. But knowing how to get dressed for any occasion by keeping two simple rules of threes can help elevate just about any look for any occasion. 

The basics 

1 statement piece + 1 in-between piece + 1 plain piece

Pulling together a top and bottom when you get dressed in the morning is easy, but taking the time to add a third piece can take a simple outfit and turn it into something more stylish. 

The aim of the third piece is to pull together the look you’re wearing and without any effort at all. Think about your outfit in layers: you’re wearing a skirt and top, but what would make this outfit complete? Is it a cardigan? Blazer? 

In summer, layers may not be comfortable, and this leads us to the second rule. Adding accessories as item number three. 

The accessories 

1 statement piece + 1 plain piece + accessory 

Before you grab all the accessories you can think of to add drama to your basic look, remember this: if you are using an accessory as your third item, make sure it’s a statement piece and that it stands out. 

Wearing a simple pair of shoes doesn’t add to a simple look unless they’re loud or add an interesting element to your outfit (think leopard print heels). This is the same for earrings, scarves, headwear or any accessories. 

Following this simple design rule can help to make dressing, decorating and arranging many aspects of your life a little easier, with a profound impact.

Written by Jemma Park