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2. YInMn Blue - Wikipedia

   en.wikipedia.org/wiki/YInMn_blue

   YInMn Blue is chemically stable, does not fade, and is non-toxic. It is more durable than alternative blue pigments such as ultramarine or Prussian blue, retaining its vibrant color in oil and water, and is safer than cobalt blue, which is a suspected carcinogen and may cause cobalt poisoning. [26]

3. Blue pigments - Wikipedia

   en.wikipedia.org/wiki/Blue_pigments

   Copper phthalocyanine ("phthalo blue") is a synthetic blue pigment frequently used in paints, inks, and dyes. It is highly valued for its superior properties such as light fastness, tinting strength, covering power and resistance to the effects of alkalis and acids. It has the appearance of a blue powder, insoluble in most solvents including ...

4. BuyBlue.org - Wikipedia

   en.wikipedia.org/wiki/BuyBlue.org

   On September 6, 2007, the site carried a message stating that 'BuyBlue 2.0' would be coming that fall, with the guide returning in a "more partisan and focused" form. As of March 4, 2010, the site displayed a banner by Advomatic with the organization's slogan and a message stating that it is undergoing scheduled maintenance. [1]

5. Ultramarine - Wikipedia

   en.wikipedia.org/wiki/Ultramarine

   Ultramarine is a deep blue color pigment which was originally made by grinding lapis lazuli into a powder. [2] Its lengthy grinding and washing process makes the natural pigment quite valuable—roughly ten times more expensive than the stone it comes from and as expensive as gold.

6. Marian blue - Wikipedia

   en.wikipedia.org/wiki/Marian_blue

   This tradition can trace its origin to the Byzantine Empire, from c. AD 500, when blue was "the color of an empress". A more practical explanation for the use of this color is that in Medieval and Renaissance Europe, the blue pigment was derived from the rock lapis lazuli, a stone imported from Afghanistan of greater value than gold. Beyond a ...

7. Shades of blue - Wikipedia

   en.wikipedia.org/wiki/Shades_of_blue

   This is an accepted version of this page This is the latest accepted revision, reviewed on 20 February 2025. Variety of the color blue For other uses, see Shades of Blue (disambiguation). "Shade of Blue" redirects here. For the song by Black Rebel Motorcycle Club, see Shade of Blue (song). For the R&B/funk band, see Shade of Blue (band). Blue Wavelength 440–490 nm Common connotations ...