About
The character "靛" represents the color indigo and originated from the term for the indigo dye extracted from plants like Indigofera. Its structure integrates the semantic component "青", indicating a blue or green hue, with the phonetic component "定", which guides pronunciation and may allude to the settling process of dye in vats. Initially, "靛" specifically denoted the dye itself, but its meaning gradually broadened to refer directly to the deep blue-purple color, establishing its role in describing that segment of the color spectrum.