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Many shoppers rarely stop to wonder why oranges, mandarins, lemons and limes are so often sold in colorful mesh bags. While the packaging may seem purely practical, experts say there is a clever marketing trick behind it that can influence how consumers perceive the fruit.
Supermarkets take advantage of a visual illusion known as the Bezold effect, color assimilation, or the “confetti illusion.” Scientists have found that the human brain never processes colors in isolation, but always in relation to their surroundings.
When bright red or orange-colored netting covers oranges, the eye blends the colors of the mesh and the fruit beneath it. As a result, the oranges appear deeper in color, more uniform and more appealing. Even slightly unripe or greenish patches can become far less noticeable when viewed through the netting.
A Professor Fooled by the Illusion
The effectiveness of the phenomenon has even been demonstrated scientifically. Karl Gegenfurtner, a perception psychologist at Justus Liebig University Giessen, experienced the effect firsthand when he bought a bag of oranges that appeared perfectly ripe in the supermarket.
Once he removed the fruit from the red netting at home, he was surprised to find that the oranges looked noticeably paler and showed a slight green tint. The experience prompted him to investigate the phenomenon in more detail.
In 2024, Gegenfurtner published a study in the journal i-Perception examining how strongly color perception can be manipulated during shopping. His research found that the technique is not limited to oranges. Lemons are often packaged in yellow netting, limes in green netting, and even products such as potatoes and chestnuts are frequently sold in color-coordinated mesh bags to enhance their appearance.
More Than Just a Marketing Tool
The netting, however, serves a practical purpose as well. Citrus fruits are highly sensitive to moisture. If they were packed in sealed plastic bags, condensation could quickly form inside the packaging, creating ideal conditions for mold growth.
The breathable mesh allows air to circulate freely around the fruit, preventing moisture buildup and helping to extend shelf life. This makes the packaging both functional and commercially attractive.
How Shoppers Can Avoid Being Misled
While the colored mesh can help keep fruit fresh, it can also make produce appear riper than it really is. Consumers who want to judge the true color and quality of oranges or mandarins are advised to look closely at the fruit underneath the packaging.
A simple trick is to gently move the mesh aside and inspect the peel directly. Doing so can help shoppers avoid the so-called confetti illusion and make a more informed choice before heading to the checkout.
The next time you pick up a bag of oranges, that bright red net may not just be protecting the fruit. It could also be shaping the way you see it.
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