Humans are endowed with eyes that can be said to be wonderful. The average person has the ability to perceive up to 7 million colors, and thanks to this ability, we can apply colors very flexibly, thereby making life a lot easier. .
One of the most striking examples of this is the application of color to everyday objects. Have you ever wondered, when the tire is almost always black, the toilet paper is required to be white, or the fire hydrant is not always red? Everything has a reason.
Fire hydrants are not always red, but usually have 4 colors: red, orange, green, blue. But the important thing is that each color has its own meaning.
In the US, the color of a fire hydrant depends on its performance, that is, how many gallons of water per minute (GPM) it can produce. In which, red is 500 gallons (1 gallon = 3.79 liters); orange is 500 – 1000 GPM; green is 1000 – 1500 GPM; and lam is above 1500 GPM.
Most commercial aircraft today are coated with white paint. It seems that this is an obvious fact, but this paint color also has its meaning.
The purpose of white paint is to improve the ability to reflect sunlight. Thanks to this color, the damage caused by the sun will be reduced, preventing the fuselage from overheating. In addition, when landing, the white aircraft also takes less time to cool down before continuing on to the next flight.
What tire isn’t black, right? But one thing that you probably don’t know, is that the rubber used to make tires is actually white.
The black color of the tire comes from carbon. People add carbon to the rubber to increase the life of the tire, and thereby turn the tire black. It is by becoming black that the tires become stronger and more durable, becoming a better conductor of heat and better protected against the effects of ultraviolet rays.
Traffic lights have 3 colors Red – Yellow – Orange. What is the meaning of these 3 colors, perhaps everyone knows. But why these 3 colors?
There’s also a reason. Red is the color with the longest wavelength in the human observable light spectrum, making it visible to drivers from a distance. Yellow-orange has a shorter wavelength than red, but still longer than green, so it should be chosen first.
It is thanks to this arrangement that the change from green to yellow, yellow to red becomes more obvious when viewed from a distance.
Pedestrian markings are designed with alternating black and white stripes pattern, and this contrast makes them more obvious when viewed from a distance . Drivers can therefore easily recognize and slow down, giving way to pedestrians crossing.
Black and white stripes also help passers-by stand out.
Taxi is the type of vehicle that needs to stand out to make it easy for customers to recognize. But they can’t use red – that’s the color of the fire truck. So, yellow was chosen.
When football balls are converted to plastic, they are painted white, not black dots like we usually see. Then, the new adidas sports company decided to add black dots to help the ball stand out more when recording on TV (only black and white TV at this time).
Basically, toilet paper when first made is not white, but ivory brown. The white you see is the product of the bleaching process.
It’s also not natural that people bleach toilet paper. Businesses can completely add color to the paper to have a wider range of products, but they do not do so because it will cost more. White was chosen simply because it works best.
In addition, white also creates a sense of safety for health – is it natural that doctors’ shirts are white?
There are many social networking platforms in the world, each with its own logo with different drawings. But there is a rather strange fact that many platforms choose blue as the main color – Facebook, Twitter, Linkedin… for example.
The reason is because this color represents safety and reliability. Social media companies want users to feel confident when entrusting their personal information to them, so they choose the color blue.