Blue, one of the three primary colors, has the shortest wavelength, ranging from 440 nm to 475 nm. Blue is the symbol of eternity, and different blue tools have different meanings.

The bluest blue: Klein blue Blue named after French artist Yves Klein (yves klein). In 1957, master Klein exhibited eight painting boards of the same size and covered with similar ultramarine pigments at the Milan Art Exhibition-“Klein Blue” was officially unveiled. This color was named “International Klein Blue” (IKB for short).



RGB :0, 47, 167

CMYK :98, 84, 0, 0

The most expensive blue:Tiffany blue

Tiffany blue, also known as Robineggblue. In 1845, Tiffany Company was first used for the cover of Tiffany’s Blue Book. From then on, the most expensive blue in the world was born. Tiffany Blue has special RGB values and CMYK values, and also has a special PANTONE color number of 1837, which is exactly the year when Tiffany was founded. Because Tiffany applied for a color patent, Tiffany blue can’t be found in PANTONE’s color system, and no one can use it without permission.

The most learned blue: school blue

A lot of famous universities have their own blue colors, such as Oxford Blue. Cambridge Blue Columbia University Blue Yale University Blue


Dyeing blue inside: dye blue.

In July, 1897, BASF successfully launched “Indigo Pure BASF” after years of research, which became the first finished indigo product for industrial production.

Generally, the blue in dyes are: brilliant blue, emerald blue, purplish blue (also known as navy blue), indigo and so on. Blue dyes generally have anthraquinone, phthalocyanine and indigo structures. Compared with other structures, the price of blue dyes is higher, so blue dyes are generally more expensive. Here’s an expensive dye blue: Dystar Lihua actually has a reactive blue E-FFN, which should be the brightest and most expensive blue seen by Xiaobian. The price is close to 1,000 yuan per kilogram, and its color light is roughly as shown in the following figure.

Picasso’s favorite blue: Prussian blue

Prussian RGB: 0/49/83

Prussian blue is iron ferrocyanide, also known as Berlin blue, Gonglan, etc. It is a double salt that reacts with ferrous sulfate in slightly acidic solution to generate ferrous ferrocyanide. The uniform color of Prussian army, the predecessor of Germany, used this color, hence the name Prussian Blue Prussian Blue.

The first iMac color: Band-Aid blue

Band-Aid RGB: 0/149/182 Band-Aid beach is a traditional Australian surf life-saving training base, which is only 10 kilometers away from the city center, and it is also one of the beaches most visited by Sydney tourists. Because the blue color of this beach is very special, it is specially named Band-Aid Blue. Band-Aid is the first iMac color. On May 6th, 1998, Jobs held a new product launch conference in Flint Center. A blue translucent computer appeared in the center of the stage, and the first generation iMac named after iMac G3 was born. This color quickly distinguishes this product from other similar products in beige, and breaks Apple’s sales record at that time.

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