History of Blue: From the Snails of Tyre to Accidental Magic in the Lab

Ask a random passerby about their favorite color. In eight out of ten cases, you will hear: "Blue." That's how we are wired. Our ancient brain reads a cloudless sky and calm water as markers of absolute safety. Blue is life. Blue is when you don't have to run from a predator because the weather is clear and the watering hole is nearby.

But try to scoop up the sky with your palms. Or squeeze paint from a sea wave. It won't work. Water is transparent, air is invisible. Nature has generously splashed blue around, but flatly refused to give it to us in our hands.

The entire history of the color blue is, frankly, a chronicle of amazing human obsession. A mad, sometimes cruel, and sometimes frankly comical race for a ghost.

"But blue is the color of the sky, and in response to a dream
It gives a series of signs to the asking consciousness..."
— Konstantin Balmont

How did we extract these signs? Through pain, chance, and alchemy.

Rot and grandeur: the secret of sea snails

Imagine the Phoenician city of Tyre thousands of years ago. You probably wouldn't want to live there. The smell over the coast was monstrous. A mixture of rotting fish and burnt bone. That's what the most expensive production of antiquity smelled like.

To get that deep, purple-tinged blue color, craftsmen had to crush the shells of predatory sea snails Murex (chilazon). Each snail gave literally a drop of secretion. Tens of thousands of mollusks were used to color a single cloak. Pliny the Elder wrote about this paint with reverence. Tyrian purple did not fade in the sun - on the contrary, it became brighter.

This color was worth so much that only emperors and high priests had the right to wear it. Blue became synonymous with absolute power. And it was paid for with rivers of snail blood.

Egyptian miracle: glass that became paint

The ancient Egyptians went another way. They did not wait for favors from nature. They decided to create blue themselves. This is perhaps the first successful synthesis of a pigment in human history.

More than four thousand years ago, Egyptian craftsmen mixed sand, copper (usually malachite), and lime. Then they threw it all into furnaces heated to 900 degrees. The result was blue glass. It was crushed into the finest dust, mixed with egg white or vegetable glue - and "Egyptian blue" was obtained.

It was a technological miracle. The color of the gods, created by the hands of mortals in the hellish flames of furnaces.

A stone that was more expensive than gold

And then the Middle Ages came to Europe. And artists needed a color for the heavens and the robes of saints. Ultramarine came on the scene.

The name translates poetically - "from across the sea." It was mined from lapis lazuli stone, which was transported along the Silk Road from the only place in the world - the harsh mountains of Afghanistan. The stone was ground by hand and carefully cleaned of impurities.

Do you know why the Virgin Mary's cloak is always deep blue in classical Renaissance paintings? Not because of symbolism. More precisely, not only because of it. Ultramarine was literally more expensive than gold. Customers of paintings prescribed in contracts with artists how many ounces of blue paint they had the right to use. Using ultramarine meant giving God the most valuable thing in the material world.

Newton, indigo and the perfect rainbow

The Golden Age could not last forever. People needed a blue that they could wear every day. The rescue came from the indigofera plant. They learned to ferment dye from its leaves - the very dye that is used today to dye our favorite jeans. Indigo became the blue for the people.

The popularity of this color was so high that even fundamental science intervened. When Isaac Newton conducted his famous experiments with a prism, he initially identified only five colors in the light spectrum. But Newton was a man of an era that sought divine harmony in everything. Five is not an ideal number. Seven is another matter (seven notes, seven days a week, seven planets).

And Sir Isaac, slightly bending the truth, added orange and... indigo to the rainbow. Simply because this color was on everyone's lips at the time.

An accident that saved lives

But the real revolution happened because of dirty dishes. In 1704, in Berlin, an alchemist and paint maker named Diesbach was trying to make a red pigment. He used potash, into which bull's blood accidentally got. Instead of the expected red, a thick, incredibly rich blue substance formed in the flask.

Thus, Prussian blue was born. The first modern synthetic paint.

It was cheap. It was stable. It was used by Katsushika Hokusai to print his immortal "Great Wave off Kanagawa." It was the color that Pablo Picasso plunged into headlong in his melancholic "blue period."

But Prussian blue has another, hidden talent. In modern medicine, it is used as a powerful antidote. If a person is poisoned with radioactive cesium or thallium salts, they are given capsules with this pigment. Lazuli binds heavy metals in the intestines and removes them from the body. A color born from a mistake literally saves lives.

Oven of Oregon and the rightness of Pasteur

One might think that in our century we already know everything about colors. Not at all.

In 2009, Professor Mas Subramanian at the University of Oregon was studying the electrical properties of manganese oxides. His student mixed yttrium, indium, and manganese, put it in an oven at 1200 degrees... and took out a powder of dazzling, piercing blue color.

The new pigment was named YInMn Blue. It is completely non-toxic. It does not fade under any conditions. And also - it perfectly reflects infrared radiation, that is, it repels heat. The perfect paint for roofs in a time of global warming.

Louis Pasteur once dropped a brilliant phrase: "Luck favors the prepared mind." Professor Subramanian was not looking for a new color. But he was attentive enough not to throw the "unsuccessful" sample in the trash.

Balmont was right. The color blue gives us signs. Through the shells of dead mollusks, through Afghan stones, alchemists' mistakes and accidents in laboratories. We continue to look for this color, just to be able to hold a small, tangible piece of the sky in our hands.

And while the cornflowers whisper their "you will reach", we probably will not stop trying.