13 Cool Facts about the Color Blue

blue paint strokes | facts about the color blue

When it comes to color psychology, some shades have more impact on people than others. Blue is one of the colors that leave a lasting impression when it comes into contact with someone. Most people associate the color blue with tranquility and peacefulness, and they aren’t wrong. If you look at some shades of blue, you can feel calmness seeping into your soul! For every fan of blue out there, here are some interesting facts about the color blue that will leave you calmer than before!

Here Are Some Fascinating Facts about the Color Blue

1. Blue Is a Rare Color in Nature

We can easily say that blue is among the most favorite colors on this planet, yet it does not exist as commonly as we’d like. Even though the sky and oceans are always there to let us enjoy the glory of blue color, there is not much besides these two things in nature. There are butterflies in blue, but the pigmentation of the color is so microscopic that scientists are still researching the creation of this rare color. Even blue eyes are not precisely blue, making them the rarest eye color in the world!

2. It Looks More Like Green

Many shades of blue appear to be green, which is nothing short of fascinating. Actually, the color blue has a long wavelength with a lower frequency, making it look greener. But when it has a short wavelength with a high frequency, you’ll see more violet shade. That’s the beauty of the color blue! It keeps everyone interested with different shades and tones. If you ever wish to see pure blue color, you can locate it at 470 nanometers wavelength.

3. It Is the World’s Favorite Color!

Maybe its rarity is why people like the color blue so much? Or the fact that certain shades and tones calm a person? Whatever the reason, it does not stop people from liking blue. However, there’s an interesting fact about this ‘world’s favorite color.’ It is not everyone’s favorite in January! Well, people associate it with feeling miserable and low during the first month of each year, but then it becomes their favorite for the rest of the year! Fascinating, isn’t it?

blue food for facts about the color blue

4. Blue Food Is Considered to Be Poisoned

We think humans are more fascinating than the color blue! First, we associate this color with calmness and tranquility, but when we talk about blue food, it’s more or less poisonous as far as human beings are concerned. Whenever we see food in blue color, we think it is unsafe to eat. If you see blue meat or blue strawberries, you’d be ready to vomit. Blueberries don’t count, though, as they are not blue! This superstition comes from centuries-old beliefs, which many brands are trying to dispel with a lot of marketing. Maybe that’s why we are, sort of, okay with blue sweets nowadays.

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5. Rayleigh Scattering Makes the Sky Blue

The sky does not appear blue during the daytime on its own. It has to thank the Rayleigh scattering effect for the beautiful color. Rayleigh scattering occurs when particles are electrically polarized, making them move at the same frequency. This effect works on sunlight when it enters Earth’s atmosphere, causing diffuse sky radiation. It results in daytime blue color. The same effect is also why we see the sky in the yellowish shade when the sun is low.

6. It Is One of the Three Primary Colors

Besides red and yellow, blue is a traditional primary color. You can make green using yellow and blue, and violet with red and blue. Blue is also a primary color for paintings and their pigments. Most artists considered this color to be precious and pure, only using it to accentuate the uniqueness of their art pieces. Even in digital media, blue is part of the primary colors that make digital colors possible. A computer can create multiple tones and shades of colors with RGB’s blue.

7. Blue Color Is a Latecomer Among Other Colors

Artists and fashion designers have been using the prominent natural colors for centuries, but blue was not their radar for a long time. It was a latecomer in art, fabric, and decorations, along with literature and language. If we look at old cave paintings, we’d see more shades of brown, black, and red, but no shade of blue. Even for fabric dyes, red, pink, and purple are more common than blue. Maybe the difficulty in creating the correct pigmentation of blue is what makes it so rare in everyday use.

blue mineral | facts about the color blue

8. Lapis Lazuli Is a Rare Blue Mineral

Finding blue in nature is extremely difficult, and searching for a mineral in this color is almost impossible. The rarest blue color in nature is Lapis lazuli which is considered a semi-precious color tone. For centuries, people have been using it to make jewelry and ornaments. In fact, you can find artifacts of Lapis lazuli from Bhirrana dating back to 7570 BC. Moreover, it was one of the most expensive pigments during the Renaissance period. It was so rare that gold has less value than Lapis lazuli!

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9. Ancient Egyptians Had Their Own Shade of Blue

Even though the shade was late to come in fabric and art, ancient Egyptians had their own blend of blue that they used luxuriously. At about 2500 BC, Egyptians started making a pigment named Egyptian blue. They heated the mixture at 1,470 to 1,650 °F (800 to 900 °C) after grinding together lime, silica, alkali, and copper to create a unique tone. The process resulted in an opaque blue glass which was crushed and combined with thickening agents to create a lasting glaze or paint. Egyptians loved this color and cherished the high quality so much that they’d only use it to make statues, ceramics, and Pharaoh tombs.

10. Blue Color is Not a Primary Color in Greek History

Blue is a traditional primary color for us, as we have known it for several centuries. However, it does not appear as a primary color in Greek history. There are four primary colors in Greek paintings, red, black, white, and yellow, as described by Pliny the Elder. Blue is used as a background color in Greek temples and for beards of Greek statues.

11. Dark Blue Has a Deeper Meaning in North America

Every culture, religion, and race has had its own standing of blue color. North America is not so different, as it emphasizes and encourages the use of dark blue to establish authority and power. It’s used for police uniforms in most major cities; giant organizations, like IBM, Bell Telephone, Royal Bank, etc., use this color as part of their brand. Moreover, IBM is called Big Blue because of the dark blue colors used in the logo development.

12. Blue Was the Color of Public Servants in Ancient Rome

Ancient Rome has meanings attached to all colors. Red, purple, green, black, etc., every color has its importance in Roman history, and blue is no different. It used to be the color of public servants’ robes. The blue shade was extracted from wood and indigo dyes. The influence of blue public servant color is still prominent in modern times. We still associate this color with public service and use it for police uniforms!

Mosquito fact | facts about the color blue

13. Blue Is Likely to Attract More Mosquitos Than Any Other Color

These blood-sucking insects are attracted to specific colors, and blue is one of them, significantly darker shades of blue. They are actually keener on the warmth produced by darker colors, including black, navy blue, brown, etc. Since blue and black shades are the favorite colors for clothing, people often find mosquitos buzzing around them. If you wear many dark-colored clothes, you understand the pain these relentless insects can be!

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Why Is Blue So Rare in Nature?

Among living things, the color blue is oddly rare. Blue rocks, blue sky, blue water, sure. But blue animals? They are few and far between. And the ones that do make blue? They make it in some bizarre and extraordinary ways compared to other colors. In this video, we’ll look at some very cool butterflies to help us learn how living things make blue and why this beautiful hue is so rare in nature.


The color blue is one of the three primary colors in nature, making it a vital color for us. The pure shade of blue lies somewhere between green and violet on the visible light spectrum. You can rarely find blue in nature, yet it is most people’s favorite color.

Given its importance, we have shared the rarest facts about blue color and hope you like them! Now that you know all the fascinating facts about the color blue, which one do you think is the most interesting? For us, it was the fact about blue food’s assumption of being poisonous. Isn’t it amazing how we associate one thing with good and evil at the same time!

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