Mileta Prodanović said this quote

“ It was if, in the process of its long and arduous journey from Afghanistan's mines to Europe's canvases, and its painful evolution from barren beginnings, ultramarine had collected and purified all the wisdom of the different worlds it traversed, retaining only what was common to then, and what was most important. This pure, clean color evokes undulating infinity, that delicate moment between day and night, an image of man constantly drifting between existence and non-existence. ”