Green Color Psychology: Why Brands Use Green to Build Trust
Brands reach for green to look natural, calm and responsible. One website experiment, one theory of colour liking and two green-only experiments show how much of that the research supports.
Answer to the question
Green color psychology: why do brands use green?
Green color psychology links green with nature, calm and permission, and brands borrow those links to look trustworthy. The research supports a small effect of colour on trust, a plausible naturalness association and a learned permission convention. Lab results on green are mixed, and meanings vary with language and geography, so green helps but does not build trust alone.
Key takeaways
- Wouter Alberts and a co-author (2011) had more than 200 people rate eight websites that differed only in colour scheme (red, blue, green or black). Colour had a significant but limited effect on perceived trust, with blue the most trusted and black the least.
- Stephen Palmer and Karen Schloss (2010) proposed that people like a colour to the degree that they like what it is usually attached to; extending that logic to green and vegetation is our inference, not their result.
- Domicele Jonauskaite and colleagues (2020) asked 4,598 people in 30 nations to link 20 emotions to 12 colour terms. Patterns were highly similar across nations and further shaped by language and geography.
- Stephanie Lichtenfeld and colleagues found in 2012 that a brief glimpse of green improved creative performance in four experiments, and in 2018 that a green workspace wall had no influence on creativity.
- Don Norman's The Design of Everyday Things describes signifiers as working through learned convention, which is the best account of green as a sign to proceed.
Brands often reach for green because the colour is said to signal trust, calm and a link to nature, and the research gives each of those a different level of support. The colour turns up across many sectors, on screens and on labels alike, so it matters to know what the studies show and what they leave open before leaning on it.
Green color psychology supports the nature side of that habit better than the trust side. People tend to like a colour for the things it is usually attached to, and green is attached to leaves and growing things, so a brand in green borrows a sense of the natural. Trust is a thinner story. The one direct test used 8 websites built to be identical except for colour scheme, and the effect it found was significant and small.
What Green Color Psychology Says About Trust
The website test is the closest the field comes to trust. More than two hundred people rated how trustworthy each of eight sites looked, across finance, law and medicine, under four schemes: red, blue, green and black. Because every respondent saw sites that differed only in colour, the design separates the scheme from layout, wording and sector.
Wouter Alberts and a co-author, who ran it in 2011, described the work as the first demonstration of a link between colour and trustworthiness on websites, and they judged the effect small beside everything else that leads people to trust a site. Green was one of the four schemes, so the study speaks to green color psychology as part of a set. Its reported result concerns the whole range, with blue at the top, a colour examined in Why Brands Reach for Blue, black at the bottom and a limited effect overall.
A broader review supports the idea that colour can matter at all. A 2014 survey of the field by Andrew Elliot and a co-author concluded that colour can carry meaning and can influence affect, cognition and behaviour, including consumer behaviour. They also wrote that the field is early, and that boundary conditions, moderators and the question of whether results hold outside the laboratory need study before firm practical recommendations are justified.
The 2011 website result and the 2014 review fit one position: colour registers with people, and it moves trust only a little. A brand expecting green alone to lift trust asks more of the colour than the website study found. A brand that disregards colour disregards a cue people do register. We side with the smaller claim, because the better-supported part of green color psychology is a nudge added to impressions that the product, the words and the brand's record mostly decide.
Why Green Reads as Natural, and How Far That Travels
Naturalness is the strand of green color psychology with the clearest mechanism. Stephen Palmer and Karen Schloss proposed in 2010 that people like a colour to the degree that they like the things it is usually attached to. In their tests, blues were liked because people like clear skies and clean water. Applied to green, the same logic points to leaves, grass and growing things. That application is our extension of the theory, not a result the paper reports for green. It would make green a colour that borrows warmth from vegetation, and it would make the borrowing a matter of learned association instead of anything in the wavelength itself.
Associations of this kind are widely shared but not identical everywhere. A survey of 4,598 people in 30 nations, speaking 22 native languages, linked 20 emotion concepts to 12 colour terms; Domicele Jonauskaite and colleagues reported it in 2020. The patterns were highly similar across nations, which supports a shared core. Language and geography shaped them further: an algorithm could predict a participant's nation from the associations beyond what the shared patterns explained, and nations closer in language or geography looked more alike. For a brand using green color psychology across borders, the practical point is narrow. A reading of green that holds in one market is a sound starting point and a testable assumption in the next.
Health judgements about food are a separate body of work, set out in Does Green Packaging Look Healthier, and the status side of buying green is covered in Going Green Where Someone Can See You. This article keeps to colour as a cue for trust and nature.
Where Green Did Something in the Lab, Then Did Not
The most direct experiments on green alone concern creativity, not trust.
They show how a colour result can change between studies. Four experiments reported in 2012 by Stephanie Lichtenfeld and colleagues found that a brief glimpse of green before a creativity task improved creative performance. The effect appeared against contrast colours that were achromatic and against ones that were chromatic, all matched with green on everything but hue, and it appeared with picture-based and word-based measures. Participants did not know the purpose of the study, and the glimpse changed neither self-reported mood nor positive activation.
A later experiment, reported by Lichtenfeld and three co-authors, tested ambient green against red on a workspace wall and found no influence on creativity. They described the experiment as methodologically sound, cautioned that a null result needs careful reading, and warned against real-world recommendations until the empirical base is firmer. The two studies used different set-ups, a brief glimpse in one and a wall colour in the other, so neither overturns the other. They fit the colour-in-context view, that a colour's effect depends on the setting it appears in.
Green as a Signal to Proceed, by Convention
The permission reading of green rests on convention, not on experiment, and green color psychology has no direct test of it. Don Norman's The Design of Everyday Things treats a signifier, a perceivable mark that tells a person what can be done, as something that works through shared convention, and it notes that conventions are learned and resist change. By that account, a green mark on a control can say go ahead only for people who have learned the reading, and only where they learned it. It is a framework about how meaning attaches to a mark, set out as design theory instead of tested as a finding.
For a brand, permission is the association most easily lost in translation. A product page, an app button and a food label can all use green, and each tells a different story: proceed, natural or responsible. The surrounding words and objects decide which story a viewer takes, and the research above cannot say which one a particular green is telling.
| Term | Plain meaning | Where it comes from |
|---|---|---|
| Colour as a trust cue | A colour scheme that nudges how trustworthy a site or brand looks | Alberts and a co-author, 2011 |
| Ecological valence | Liking a colour because of the things it is usually attached to | Palmer and Schloss, 2010 |
| Colour-emotion association | A learned link between a colour term and a feeling | Jonauskaite and colleagues, 2020 |
| Fertile green | The finding that a glimpse of green raised creative performance in four experiments | Lichtenfeld and colleagues, 2012 |
| Signifier | A mark that tells a person what can be done | Norman, The Design of Everyday Things |
For a brand choosing green, the evidence supports a modest claim. The colour is a plausible cue for nature, a learned one for permission and a small contributor to trust, and it works best when the product, the words and the setting say the same thing. Asking green for more than a nudge would outrun the studies, none of which shows the colour carrying a reputation alone, in every market, or in every setting where a brand might place it.
Common questions
Green color psychology: why do brands use green?
Brands borrow the associations people link with green, mainly nature, calm and permission. The one direct test of colour and trust, a 2011 website experiment with more than 200 raters, found a significant but small effect of colour scheme, with blue the most trusted and black the least. Green color psychology therefore supports green as a modest cue, not a trust builder on its own.
Does green make people trust a brand more?
Not by itself, on the evidence green color psychology offers. Green was one of four colour schemes in the 2011 website study, and the reported effect of colour was limited beside other trust factors. Product, wording and reputation carry more weight.
Does green mean the same thing in every market?
Broadly, with local variation, as with other colour meanings. A 2020 study of 4,598 people in 30 nations found colour-emotion patterns that were highly similar across nations and further shaped by language and geography. A brand entering a new market can treat its reading of green as a starting point to test.
Does seeing green improve creativity?
The evidence is mixed. Four experiments in 2012 found that a brief glimpse of green before a task improved creative performance, while a 2018 experiment with a green workspace wall found no influence. Neither measured trust.
Sources
Norman, D. The Design of Everyday Things. Seed book; vault hub Books/The Design of Everyday Things.
Alberts, W. A., & van der Geest, T. M. (2011). “Color matters: color as trustworthiness cue in web sites.” Technical Communication, 58(2).
Elliot, A. J., & Maier, M. A. (2014). “Color Psychology: Effects of Perceiving Color on Psychological Functioning in Humans.” Annual Review of Psychology, 65(1). doi:10.1146/annurev-psych-010213-115035 https://doi.org/10.1146/annurev-psych-010213-115035
Palmer, S. E., & Schloss, K. B. (2010). “An ecological valence theory of human color preference.” Proceedings of the National Academy of Sciences, 107(19). doi:10.1073/pnas.0906172107 https://doi.org/10.1073/pnas.0906172107
Jonauskaite, D., Abu-Akel, A., Dael, N., Oberfeld, D., and colleagues, with Mohr, C. as senior author (2020). “Universal Patterns in Color-Emotion Associations Are Further Shaped by Linguistic and Geographic Proximity.” Psychological Science, 31(10). doi:10.1177/0956797620948810 https://doi.org/10.1177/0956797620948810
Lichtenfeld, S., Elliot, A. J., Maier, M. A., & Pekrun, R. (2012). “Fertile Green: Green Facilitates Creative Performance.” Personality and Social Psychology Bulletin, 38(6). doi:10.1177/0146167212436611 https://doi.org/10.1177/0146167212436611
Lichtenfeld, S., Maier, M. A., Buechner, V. L., & Elliot, A. J. (2018). “Ambient Green and Creativity.” Creativity Research Journal, 30(3). doi:10.1080/10400419.2018.1488197 https://doi.org/10.1080/10400419.2018.1488197