Cobalt blue spinal is a vivid, intense blue pigment that is derived from cobalt salts, specifically cobalt aluminate. It's known for its bright, clean, and almost glowing hue, reminiscent of deep blue skies or bright ocean waters. The term "spinal" in this context refers to a specific form of cobalt blue that has been finely ground and processed, often used in artistic applications such as painting, ceramics, and glassmaking.

The pigment itself is stable, lightfast, and non-toxic, making it a favorite for artists who require a reliable and vibrant blue. It can range from a deep, cool blue to a more intense, almost electric shade depending on its formulation.