Colour index (C.I.)

The Colour Index (C.I.) is a standardized numerical system used by manufacturers and scientists to identify and specify the precise hue of a color, especially in the textile and dye industries. It helps ensure consistency and accuracy when matching or reproducing colors. Each C.I. number corresponds to a specific shade, much like a unique code, allowing for precise communication about colors across different products and applications. In essence, it’s a way to organize and communicate colors systematically, making color identification reliable and efficient.