IKB

b. wanted to know what Yves Klein blue was. So here you go.

"In 1955, Klein discovered ultramarine, a blue so deep and vibrant it hummed. However, mixing it with water diluted the dry pigment's intensity. Determined, he worked with the chemical manufacturer Eduard Adam to invent a synthetic resin fixative that could suspend the powder without changing its colour—thus retaining its velvety luminosity in paint form.

So effective was the result that Klein patented it as International Klein Blue (IKB), and used it extensively as part of his oeuvre. He impregnated canvas, classical plaster casts and sponges with IKB, applying it thickly so to boost what he called its ‘cosmic energy.’"


Apparently, IKB can't be accurately represented by computer monitors.The colour actually looks more like this:

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