Developed as a textile dye in 1901, indanthrone was adopted by artists in the 20th century for its extraordinary lightfastness and rich dark blue-violet colour. It represents the textile dye industry's contribution to the artist's palette — a pigment that found a second life in fine art.

Deep, serious, and enduring. Indanthrone is the blue of the deepest night sky — a blue so dark it approaches violet-black. It creates a sense of profound depth and introspection. Unlike the romanticism of ultramarine or the brightness of cerulean, indanthrone is austere and absolute.

Indanthrone blue represents the ongoing contribution of industrial chemistry to fine art. As artists and conservators became increasingly concerned with pigment permanence in the 20th century, industrial vat dyes like indanthrone found their way into artist paint ranges specifically for their exceptional lightfastness — a quality developed for commercial textile permanence now serving artistic longevity.