Who is it that guards all the US Embassies Globally and flies the Chopper for the US President, and lives at the corner of 8th and I in South East DC?
Egyptian Blue
>Walk like an Egyptian
Blue was first produced by the ancient Egyptians who figured out how to create a permanent pigment that they used for decorative arts. There’s a long list of things we can thank the ancient Egyptians for inventing, and one of them is the color blue. Considered to be the first ever synthetically produced color pigment, Egyptian blue (also known as cuprorivaite) was created around 2,200 B.C. It was made from ground limestone mixed with sand and a copper-containing mineral, such as azurite or malachite, which was then heated between 1470 and 1650°F. The result was an opaque blue glass which then had to be crushed and combined with thickening agents such as egg whites to create a long-lasting paint or glaze.
The Egyptians held the hue in very high regard and used it to paint ceramics, statues, and even to decorate the tombs of the pharaohs.
Ultramarine
The history of ultramarine began around 6,000 years ago when the vibrant, semi-precious gemstone it was made from—lapis lazuli—began to be imported by the Egyptians from the mountains of Afghanistan. However, the Egyptians tried and failed to turn it into a paint, with each attempt resulting in a dull gray. Instead, they used it to make jewelry and headdresses.
Also known as “true blue,” lapis lazuli first appeared as a pigment in the 6th century and was used in Buddhist paintings in Bamiyan, Afghanistan. It was renamed ultramarine—in Latin: ultramarinus, meaning “beyond the sea”—when the pigment was imported into Europe by Italian traders during the 14th and 15th centuries. Its deep, royal blue quality meant that was highly sought after among artists living in Medieval Europe. However, in order to use it you had to be wealthy, as it was considered to be just as precious as gold.
https://mymodernmet.com/shades-of-blue-color-history/