The science behind this test
This page states what the test measures, where the numbers come from, what research supports the colour idea, and what it does not. If something here reads as a caveat, it is one.
1. What the test measures
The test measures the Big Five: Extraversion, Agreeableness, Conscientiousness, Emotional reactivity (Neuroticism) and Openness. The Big Five is the most widely used descriptive model of personality differences, and decades of research support its five-factor structure.
The statements are the public-domain IPIP items from ipip.ori.org. The full test uses all 50 IPIP Big Five markers, 10 per trait. The quick test uses the 20 Mini-IPIP items, 4 per trait. The IPIP licence allows copying, editing and use for any purpose without a fee.
You answer on a 5-point scale: very inaccurate, moderately inaccurate, neither, moderately accurate, very accurate. Some statements are worded in the opposite direction and are reverse-scored (6 minus your answer) before the trait average is computed.
One extra statement checks attention: "Please choose ‘Moderately accurate’." It is not scored, and missing it only adds a gentle caution to your result.
2. Norms and percentiles
Percentiles need a reference sample. We use the public Open-Source Psychometrics Project IPIP-50 dataset: 19,718 complete responders who took the same 50 items online (collected c. 2012–2014, retrieved 5 October 2026). Means, standard deviations and reliability alphas were computed from the raw data.
Full test (IPIP-50, 10 items per trait)
| Trait | Mean | SD | Alpha |
|---|---|---|---|
| Extraversion (Yellow) | 3.011 | 0.922 | 0.892 |
| Agreeableness (Green) | 3.845 | 0.715 | 0.832 |
| Conscientiousness (Blue) | 3.347 | 0.731 | 0.813 |
| Intensity (Red) | 3.097 | 0.862 | 0.869 |
| Openness (Purple) | 3.909 | 0.625 | 0.794 |
Quick test (Mini-IPIP, 4 items per trait)
| Trait | Mean | SD | Alpha |
|---|---|---|---|
| Extraversion (Yellow) | 2.896 | 1.029 | 0.799 |
| Agreeableness (Green) | 3.912 | 0.870 | 0.799 |
| Conscientiousness (Blue) | 3.193 | 0.901 | 0.678 |
| Intensity (Red) | 2.948 | 0.897 | 0.665 |
| Openness (Purple) | 4.026 | 0.771 | 0.678 |
Your trait average (1–5) is converted to a z-score against the norm mean and SD, then to a percentile through the normal distribution. A percentile of 70 means you scored above about 70% of that sample. It is not a percentage of personality.
The likely range around each percentile is an 80% interval: the score plus or minus 1.28 standard errors of measurement, where SEM = SD × √(1 − alpha). A less reliable scale produces a wider range. This is why we call it a "likely range" instead of an exact score.
Caveat. This is a volunteer online sample, not a probability sample of any country. We therefore say "compared with other people who took this kind of test online", not "compared with the general population".
3. What research supports about colour
Colour meanings are widely shared. In the Global Colour Meaning Project (Jonauskaite et al., 2020), 4,598 people in 30 nations and 22 languages linked colours with similar feelings. Red was most often love and anger, blue calm, yellow joy. The average pattern similarity was r = .88. Local differences exist.
Colour preference has a lot to do with associations. The ecological valence theory (Palmer & Schloss, 2010) found that how much people like a colour tracks what objects and experiences the colour brings to mind. This is why we do not treat colour liking as a personality signal.
Trait and colour links are real but small. A 2018 study in Personality and Individual Differences found extraversion predicts liking high-chroma colours, and openness predicts low-chroma colours. Reviews of the field find most correlations near zero, with only 6 of 30 above r = .1. These are weak tendencies, useless for judging one person.
Colour can shift behaviour in context. Elliot and Maier (2014) and Elliot (2015) show effects of colour on attention and evaluation, but many single effects have failed to replicate and depend on context. Colour is not a hidden force.
4. What research does not support
Your favourite colour does not reveal your personality. There is no consistent evidence for it. We label traits with colours because the labels are memorable, and we say plainly that the colour does not come from a colour you chose.
The Lüscher colour test has low test-retest reliability (about .32–.47) and no consistent personality link across samples (N = 6,643). Reviewers describe it as a Barnum-effect instrument. We do not use it.
The Hartman Color Code shows weak correlations with validated tests and large error at the individual level (Ault, 2007). We do not use it.
True Colors has no independent peer-reviewed evidence of validity; the published support is trainer-run convergence with the MBTI. We do not use it, and we are not affiliated with it.
DISC-style and Insights Discovery models are proprietary and mostly supported by vendor studies. We did not find independent psychometric validation. We do not use them either. If a site claims any of these tests reveal personality from colour choice, be sceptical.
5. How the colours map to traits
| Colour | Trait | Why, and how strong the link is |
|---|---|---|
| Yellow | Extraversion | Across 30 nations, yellow is linked with joy, energy and warmth (Jonauskaite et al., 2020). Extraverts also tend to like high-chroma colour more than introverts do (Personality and Individual Differences, 2018), though that link is weak. |
| Green | Agreeableness | In colour-emotion data, green sits with contentment, relief and harmony. The ecological valence theory (Palmer & Schloss, 2010) explains much of the preference for green through the pleasant things it reminds people of, such as nature and safe surroundings. |
| Blue | Conscientiousness | Blue is the most liked colour in most surveys. It carries calm, control, trust and clean-water associations, and in colour-emotion data it seldom triggers arousal. Those meanings fit the careful, ordered side of Conscientiousness. |
| Red | Intensity | Red has the strongest and most consistent emotion link of any colour: it is tied to love, anger and excitement in all 30 nations studied (Jonauskaite et al., 2020). That is why red labels Intensity here. The colour is about arousal, not danger. |
| Purple | Openness | Purple is the least studied of the five colours. It is used here by convention, for imagination and creativity. Openness is the one trait with a weak link to liking low-chroma colours (Personality and Individual Differences, 2018), but treat this colour label as the most arbitrary of the five. |
Summary: red, blue and yellow have the most support as shared colour meanings. Green has moderate support. Purple is a convention, and we treat it as the most arbitrary label of the five.
6. Limits
This is a self-report questionnaire taken in one sitting. Mood, energy and recent events all move the answers. Test-retest reliability for the Big Five is good over weeks and months, but a single result is a snapshot, not a permanent label.
The test is not a clinical instrument. It cannot diagnose a mental health condition, and it should not be used for hiring, promotion, admissions or any decision about another person. If you feel distressed, talk to a qualified professional or a local crisis service.
The colour mapping is a presentation choice. It does not add evidence to the score. The IPIP items are public domain, which is why the test can be free and can show the item text openly.
Sources
- Goldberg, L. R. (1992). The development of markers for the Big-Five factor structure. Psychological Assessment, 4(1), 26–42.
- Goldberg, L. R. (1999). A broad-bandwidth, public-domain personality inventory measuring the lower-level facets of several five-factor models. In Personality Psychology in Europe (Vol. 7, pp. 7–28).
- Donnellan, M. B., Oswald, F. L., Baird, B. M., & Lucas, R. E. (2006). The Mini-IPIP scales: tiny-yet-effective measures of the Big Five factors of personality. Psychological Assessment, 18(2), 192–203.
- IPIP item pool and scoring keys (public domain). ipip.ori.org and Mini-IPIP key. Retrieved 5 October 2026.
- Open-Source Psychometrics Project (2012–2014). IPIP Big-Five Factor Markers data (BIG5.zip, N = 19,718). openpsychometrics.org/_rawdata/. Retrieved 5 October 2026.
- Jonauskaite, D., et al. (2020). The global colour meaning project. Psychological Science, 31(10), 1245–1260. globalcolormeaning.org
- Palmer, S. E., & Schloss, K. B. (2010). An ecological valence theory of human colour preference. PNAS, 107(19), 8877–8882.
- Personality and Individual Differences (2018). Extraversion and high-chroma colour preference. sciencedirect.com
- Elliot, A. J., & Maier, M. A. (2014). Color psychology: effects of perceiving color on psychological functioning in humans. Annual Review of Psychology, 65, 95–120.
- Elliot, A. J. (2015). Color and psychological functioning: a review of theoretical and empirical work. Frontiers in Psychology, 6, 368.
- Ault, R. (2007). The relationship between the Hartman Color Code and the Big Five. International Journal of Selection and Assessment.
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Fifty IPIP statements. Percentiles against a published sample. A palette you can share or keep.
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