Across several small but intriguing experiments, researchers noticed that people scoring higher on measures linked to intelligence tended to gravitate toward the same hue. It is not the loudest shade on the palette, nor the trendiest, yet it repeatedly signals calm thinking, reliability and a taste for structure.
How a favourite colour ended up in intelligence research
Colour psychology has usually focused on marketing, branding and emotion. Companies test logos, therapists talk about soothing tones, interior designers try to sell tranquillity through paint charts. Recently, though, scientists have been asking a different question: can colour preference hint at how we think?
A study referenced by the platform ScienceDirect looked at how university students from different academic tracks chose colours. The sample was small – just 80 participants – but it was carefully split between graphic design students and computer science students. Each student was asked about favourite colours for clothing and for interior decoration.
The goal was not to decide who was “smart” based on grades alone. Instead, researchers looked at how educational path and associated personality traits might align with particular colours: impulsive vs. reflective, risk-taking vs. methodical, socially driven vs. task driven.
Researchers observed a consistent pattern: more analytical, academically focused students were less drawn to loud, high-arousal colours such as bright red, and more attracted to cooler, calmer tones.
From this pattern emerged one clear frontrunner.
The colour most linked to smarter-than-average people
In the study, one shade stood a little apart from the rest. When participants were asked which colour they preferred for clothing, blue came out on top, chosen by around 15% of the group. That figure is not overwhelming, but the profile of those who leaned towards blue caught the researchers’ attention.
Students who favoured blue often described themselves – and were rated by peers – as calm, dependable and less impulsive. These are traits that frequently correlate with higher academic performance and stronger problem-solving skills.
Blue emerged as the colour most consistently associated with calm, thoughtful, reliable people – the very traits often linked with higher intelligence.
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Blue has long carried these associations in everyday culture: think of navy suits in corporate settings, blue logos for banks and tech firms, and blue tones in productivity apps. The colour signals stability and focus rather than risk and impulse.
Why red tends to be linked with “less intelligent” choices
Researchers and commentators also highlight another pattern: strong preference for bright red often appears alongside more impulsive personality traits. People who pick red as their go-to colour describe themselves as bold, thrill-seeking and emotionally reactive.
That does not mean red-lovers are less intelligent. It means that, on average, their behaviour is more driven by immediate emotion than by cautious analysis. In a lab questionnaire, that can look like a lower “cognitive reflection” score, which some psychologists treat as a proxy for rational thinking.
- Red: associated with extraversion, passion, impulsive decisions, quick action.
- Blue: associated with patience, planning, reliability, measured responses.
- White: associated with order, professionalism, cleanliness, structure.
So when one outlet labelled red the “favourite colour of less intelligent people”, it was really describing a tendency towards impulsive traits, not raw brainpower.
What your colour choice may say about your personality
The ScienceDirect study suggests educational background subtly shapes personality and, by extension, colour preference. Graphic design students, often more open to risk and experimentation, tended to welcome stronger, warmer hues. Computer science students, generally more methodical, leaned into cooler tones and neutrals.
Here is how several common colours are often interpreted in psychological and marketing research:
| Colour | Typical associations | Linked personality traits |
|---|---|---|
| Blue | Trust, calm, intelligence, logic | Reliable, reflective, organised |
| Red | Passion, danger, urgency, love | Bold, impulsive, energetic |
| Green | Nature, growth, safety, balance | Grounded, caring, security-minded |
| Orange | Success, abundance, creativity | Optimistic, sociable, entrepreneurial |
| White | Order, purity, professionalism | Structured, tidy, rule-focused |
Each colour tends to carry a bundle of meanings – success for orange, security for green, order for white – and people often choose the shade that “feels” most like them.
These links are shaped by culture, upbringing and context. In finance, red suggests losses; in fashion, it can mean glamour. In some countries, white signals mourning rather than purity. Any claim that “smart people like blue” rests on these shifting cultural codes as much as on psychology.
Why the “smart equals blue” claim needs caution
Researchers involved in this type of work stress that the link between blue and intelligence is suggestive, not definitive. The sample sizes are modest, and the measures of “intelligence” are indirect: exam results, field of study, or traits such as self-discipline and long-term planning.
Intelligence itself is complex. Psychologists talk about fluid intelligence (solving new problems), crystallised intelligence (knowledge), and emotional intelligence (handling relationships). None of these can be accurately read from a wardrobe or paint chart.
Liking blue does not make you clever, and liking red does not knock points off your IQ. At best, colour hints at temperament, which only partly overlaps with intelligence.
There is also the risk of stereotyping. If people unconsciously associate blue with “smart and serious” and red with “reckless”, those who show up in bright colours might be judged before opening their mouths. The article that highlighted this research even notes that the conclusions are subjective and need much deeper investigation.
How this plays out in everyday life
Even with these caveats, the research offers a few practical applications. If you are preparing for a job interview or exam, you might reach for blue clothing not just because of the stereotype but because it helps create a calm mindset. Dressing in a colour linked with composure can subtly influence how you feel and how others respond.
In interior design, shades of blue and green feature heavily in offices, classrooms and healthcare settings. Architects use them to encourage focus and reduce agitation. That choice lines up neatly with the idea that cooler tones match a more reflective, cognitively engaged state.
By contrast, red remains common in places designed to provoke action: fast-food logos, sales stickers, sportswear. These spaces are built for speed and emotion, not careful reasoning.
Trying a small personal “colour experiment”
Anyone curious about their own patterns can run a simple, low-tech experiment:
- Pick two outfits, one dominated by blue or another cool tone, the other by red or orange.
- Wear each on days with similar tasks, such as study sessions or work meetings.
- Note your mood, focus level and the way people respond to you.
Repeating this several times often reveals subtle shifts: some report feeling calmer and more methodical in blue, more assertive yet easily distracted in red. The effect will not be dramatic for everyone, but paying attention to these cues can help you choose colours that support the kind of thinking you need that day.
Two terms often used in this research are worth clarifying. Colour preference usually means the shade you choose when there is no external pressure – for a T-shirt, notebook or phone case. Cognitive reflection describes the tendency to pause and think again before answering, especially when the first answer seems obvious but might be wrong. Studies finding links between blue and intelligence often rely on this second measure.
Taken together, current data paints a nuanced picture: blue keeps showing up around patient, structured thinkers, while fiery shades attract people who chase stimulation and speed. The colour you reach for in the morning probably says something about how you want to feel – and maybe, just a little, about how your mind likes to work.