The color Casper Blue
refers to a famous painting by the painter Caspar David Friedrich 'Wanderer Above the Sea of Fog'. Friedrich paints beautiful and dreamy images, but this work is seen as his masterpiece. You can see in the foreground a man with a cane on top of a mountain. His back is turned to the viewer, he is contemplating the dreamy blue landscape, that doesn't seem to stop. The blue glow almost evokes a magical, heavenly atmosphere.