The color blue has had a remarkable impact on the history of world trade. Rarely occurring in the natural world, blue pigments were, for centuries, highly sought-after by craftsmen and merchants.
원문출처 : https://www.cnn.com/style/article/how-the-color-blue-changed-art-forever/index.html
원문출처 : https://www.cnn.com/style/article/how-the-color-blue-changed-art-forever/index.html