Blue 1 Average Agente colorante/Pigmento No known benefits Blue 1 at a glance Synthetic pigment used to add colour to makeup, food products, and skin care Ruled safe in its current use Blue 1 description Blue 1 is a synthetic pigment used to add colour to makeup, as well as skin care and food products. It is water-soluble. The United States Food and Drug Administration has ruled Blue 1 safe in its current use.