Summary of Key Points
The main message of this article is that the choice of clothing color while exercising is directly related to safety, with the key factor being the contrast between the clothing color and the background. The more distinct the color is from its surroundings, the easier it is to be noticed, which can reduce the risk of danger and increase the chances of being rescued. The article provides detailed analyses of color choices for various activities such as swimming (in different types of water), cycling, hunting, skiing, and hiking, and also clarifies the myth that yellow clothing attracts sharks.
1. Swimming: Choose Your Swimsuit Color Based on the Water Environment
The visibility of swimsuit colors varies greatly depending on the background and lighting conditions in different water bodies:
- In a pool: With light-colored bottoms, white or light blue swimsuits are almost invisible under calm water; even darker blue swimsuits blend into the water when the surface is turbulent. With dark pool bottoms, gray-blue or dark blue swimsuits are the least noticeable.
- In outdoor lakes: From the shore, only highly saturated fluorescent orange, yellow, and green colors are clearly visible; other colors (such as blue and white) tend to blend into the water and become invisible.
- In the sea: Red light disappears in shallow waters, while orange and yellow fade after 10–15 meters, leaving only blue visible at greater depths. Therefore, for deep diving, white swimsuits reflect the remaining blue light and are the most conspicuous; however, when floating on the surface, fluorescent colors (such as orange flip-flops) are the easiest to spot.
In summary: Avoid wearing blue in a pool; choose fluorescent colors for open-water swimming, and opt for white or fluorescent colors for deep diving.
2. “Yellow Attracts Sharks”? It’s a Misconception
Many people fear that yellow swimsuits attract sharks, but the truth is:
- Sharks have monochromatic vision (they only have one type of cone cell in their eyes), so they see the world in shades of black, white, and gray and cannot distinguish between colors.
- The belief that yellow attracts sharks stems from the fact that the U.S. Navy used yellow life jackets during World War II, and survivors reported encountering more sharks while wearing them. However, research later showed that sharks are more sensitive to contrast. Yellow stands out in blue-green sea water due to its high contrast, making it easier for sharks to notice, not because the color itself attracts them.
- The experiment in “The MythBusters” show that yellow bags were bitten more often because of their high contrast, not because sharks prefer that color.
3. Other Sports: Wrong Color Choices Double the Risk
Color choices are important for safety in other sports as well:
- Cycling: Wearing a fluorescent yellow jacket with reflective strips reduces the accident rate by 38% (for personal injuries) and 55% (for motor vehicle accidents). Reflective materials are essential at night, especially when attached to knees and ankles (moving legs make them more visible).
- Hunting: 94% of hunters who were accidentally injured were not wearing orange hunting attire. Orange contrasts sharply with the forest background, making it easy for other hunters to identify you; many states have laws requiring the use of orange clothing.
- Skiing: Avoid white and light gray (which blend into the snow); instead, wear fluorescent orange or bright yellow. Conditions like overcast skies and fog increase the risk; wearing white can make you indistinguishable from the snow after a fall, making it difficult for rescuers to locate you.
- Hiking: Avoid black and dark green (which resemble trees or rocks); choose bright colors such as orange and red. Wear a bright-colored jacket in case you get lost; drones or rescuers can spot you more easily.
4. The Core Principle: No “Absolutely Safe Colors,” Only High Contrast
The article emphasizes that no color is inherently dangerous or safe; the key is the contrast with the background. For example:
- Blue swimsuits are dangerous in a pool because they blend into the water or the pool bottom.
- White is safe for deep diving because it reflects the remaining blue light.
- Orange clothing is safe while hunting because it contrasts sharply with the forest.
In conclusion, before exercising, consider the color of your surroundings and choose a color that stands out from the background. This might be the most overlooked detail, but it can be the difference between life and death.