The postage stamp celebrating the 150th anniversary of the Universal Postal Union features a detailed illustration of a postal worker riding a vintage yellow bicycle equipped with leather saddlebags designed to hold letters. The bicycle and rider are depicted in traditional postal attire, with a carrier pigeon flying overhead to symbolize historical communication. The background includes a world map to represent the global scope of the Union. The design incorporates Dark Blue (CMYK 1/99/1/0) for key elements, Light Green (CMYK 50/0/0/0) for the background, and Pale Yellow (CMYK 51/51/0/0) for highlights. Highlight colors are blended using a "multiply" mode with specific opacity levels to create a rich, layered effect.