SYMHC Classics: The Color Blue

This episode of 'Stuff You Missed in History Class' explores the fascinating history of the color blue, tracing its journey from a color that ancient languages lacked a word for to a globally dominant hue. The hosts, Tracy B. Wilson and Holly Frey, begin by discussing how blue was once rare and difficult to produce, with many ancient cultures—like those in Homer's time—having no distinct term for it. Research by William Ewert Gladstone and later Berlin and Kay revealed a universal pattern in color terminology: black and white came first, followed by red, then yellow or green, and finally blue, only appearing when a language had six basic color terms. The episode dives into the scientific and cultural reasons behind this, including debates over whether language shapes perception or vice versa. The hosts then detail the arduous processes of creating blue pigments and dyes, from Egypt’s synthetic Egyptian blue to the incredibly labor-intensive ultramarine made from lapis lazuli, which was worth more than gold. The invention of synthetic alternatives like Prussian blue and synthetic ultramarine democratized access to blue, transforming art and fashion. The episode also examines the global impact of indigo dye, from its ancient use in Peru and the Middle East to its role in colonial economies and the exploitation of enslaved labor in the Americas and India. The narrative concludes with reflections on how blue’s evolution reflects broader human innovation, cultural values, and social hierarchies. Key takeaways include: 1) Blue was not always a common color in human language or culture—many ancient languages lacked a word for it. 2) The creation of blue pigments like ultramarine and Egyptian blue required extreme heat, labor, and rare materials, making them luxury items. 3) The rise of synthetic blue pigments and dyes in the 19th century made blue accessible to the masses, transforming art and textiles. 4) The global trade in indigo was deeply tied to colonialism and exploitation, particularly in India and the Americas. 5) Blue’s symbolic meaning evolved over time—from divine association in religious art to a symbol of modernity and ubiquity. 6) The perception of color is not purely biological but shaped by language, culture, and history. 7) Even today, the chemistry behind indigo dyeing remains a marvel, with the dye turning from green to blue upon exposure to air. 8) The story of blue reveals how deeply intertwined color is with power, economics, and human ingenuity.