How to pick the perfect colour palette every time

In the 1980s, colour psychologist Angela Wright revolutionised colour theory by identifying links between patterns of colour and patterns of human behaviour. She found that all colours can be classified into one of four tonal groups, and that mathematical relationships underpin the shades and tones within each group. In other words, Wright proved objective colour harmony.

She went on to develop the Colour Affects System, which identifies links between the four colour groups and four basic personality types, based on original research involving Aristotle, Newton and German writer Johann Wolfgang von Goethe.

If harnessed correctly, designers can use the Colour Affects System to control the message of their colour palettes and, crucially, kill subjective debate around colour in client meetings with evidence to back up their decisions. Here's how it works…

Colour Affects System: the basics  

Bp logo

BP uses group 1 colours: clear, delicate and warm

Every shade, tone or tint on the colour spectrum can be classified into one of four colour groups, based on how warm or cool it is. All colours within each group correlate mathematically and naturally harmonise, while colours combined from different families don't. 

There are also four basic personality types – ranging between extrovert and introvert – and each type has a natural affinity with one colour group. Universally, everyone will find a palette chosen with colours from the same group harmonious, but they'll find a palette drawn from their personality type's corresponding colour group even more attractive.

You'll find a breakdown of the different colour groups on the next page.

Dreams logo

Bedding firm Dreams uses elegant and timeless group 2 colours

Colour in harmony 

"Music and colour work in much the same way," explains Wright, who developed the Colour Affects System from her earlier research, The Wright Theory. She's provided colour palettes for clients ranging from Shell International Petroleum Company and Procter & Gamble to BT, Unilever, and more. 

"One musical note has its own properties, but it doesn't do much until you put it with other notes. There are no wrong notes, and there are no wrong colours, either. It's how you use them. If you put them together in harmony, they produce a positive response. But it only takes one bum note to throw the whole thing out."

Currently, Wright is working on a digital version of the Colour Affects System, which will be launching at the end of this year. The software enables users to select their starting colour – the dominant logo colour, for instance – and then classifies it into one of the four groups, removing all colours from the other three groups. Users are left with a huge, harmonious selection from which to then develop a brand's colour palette. 

McDonald's logo

McDonald's corporate colours are mainly group 3: intense and fiery

"You pick the subsequent colours for your branding scheme in the same way as you do now," Wright explains. "You've got a large framework – there are millions of colours to choose from – except there are no bum notes, because there are mathematical correlations that underpin each colour," she adds. 

How effective is the Colour Affects System?

A few years ago, Wright was asked by a mail order company to adjust the colours of a leaflet selling an opera CD. "The in-house design team had created a leaflet and they wanted me to tweak the colours into harmony," she recalls. "The ones they'd used were okay – quite familiar – but they're weren't right, either psychologically or harmoniously."

texaco logo

Texaco uses a group 4 palette, suggesting efficiency, sophistication and excellence

Wright adapted the colours so that the chosen palette came from the same tonal family. "They sent out two identical mail shots, and they sold 560,000 more CDs with the tweaked leaflet than the original," she says. 

"And all I did was tweak the harmony after it had been designed – I didn't specify the colours used in the first place." It seems the right colours do sell.

Next page: the four colour groups revealed

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Julia Sagar
Editor-in-chief retail

Julia is editor-in-chief, retail at Future Ltd, where she works in e-commerce across a number of consumer lifestyle brands. A former editor of design website Creative Bloq, she’s also worked on a variety of print titles, and was part of the team that launched consumer tech website TechRadar. She's been writing about art, design and technology for over 15 years.