Colour and the mind
The red effect in sport and attention
A famous study found that fighters in red won more often. Later, larger studies found the advantage small, uneven or absent.
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The red effect is the claim that the colour red changes performance and judgement: that athletes in red win more, that red signals dominance, and that seeing red before a test lowers scores. It began with a striking study of the 2004 Olympic Games. Since then the evidence has become more mixed, and any real effect is probably small.
The Olympic study
At the Athens Olympics in 2004, competitors in boxing, taekwondo and two styles of wrestling were given red or blue kit at random. The British researchers Russell Hill and Robert Barton counted the results and reported in the journal Nature in 2005 that those in red won slightly more often, mainly in closely matched bouts. They suggested that red signals dominance in humans, as it does in some birds and monkeys. The paper was widely reported, and red shirts and sporting success have been linked in the press ever since.
What came next
Follow-up work complicated the picture. A German experiment showed taekwondo referees the same recorded bouts with the colours digitally swapped, and they gave more points to whichever fighter appeared in red. That points to a bias in judging, not in fighting. Later analyses covering many more Olympic Games and world championships found that the advantage shrank or vanished, particularly after electronic scoring came in. Studies of football leagues have given conflicting answers. The cautious conclusion is that red may give a small edge where humans judge close contests.
Red, tests and attraction
A second line of research claimed that a glimpse of red before a test, such as a red cover page, lowers scores because red is tied to danger and to a teacher's red pen. A third claimed that red clothing makes people look more attractive. Both drew a great deal of attention, and both have had large repeat studies that found weaker effects or none. Red does reliably draw the eye, which is why warnings, sale signs and stop lights use it. That is a fact about attention, and it does not show that red changes ability.
Colours on this page
Sources and further reading
- Color psychology on Wikipedia
- Hill and Barton, Red enhances human performance in contests, Nature (2005)
- BBC Future: How the colour red warps the mind
- Elliot, Color and psychological functioning: a review of theoretical and empirical work, Frontiers in Psychology (2015)
Original text by the Rang desk, written with AI assistance and checked against the sources above. Meanings of colour vary from place to place and person to person. If we have something wrong, tell us.