Multi-projector color uniformity describes how consistently color appears across the complete projected canvas, including the center, edges, overlap zones and curved viewing surfaces. Even after projector-to-projector color matching is completed, local color shifts can remain because of optical characteristics, screen reflectance, viewing angle, geometry, ambient light and blend-zone behavior. This guide explains how to evaluate and improve color consistency across immersive, mapping, museum, dome and large-screen multi-projector systems.