Oral mucosal pigmentations form a diverse group of lesions that may originate from endogenous sources such as melanin or hemosiderin, or exogenous agents like heavy metals and medications. These pigmentations can be physiological, reactive, neoplastic, or indicative of systemic disease. Clinically, they appear as macules or patches of various colours—brown, black, blue, or grey—affecting areas such as the gingiva, buccal mucosa, and palate. Although most are benign, some may resemble malignancies or suggest underlying systemic conditions, requiring careful evaluation. Accurate diagnosis depends on thorough clinical assessment, patient history, and, when appropriate, histopathological examination to inform management and ensure optimal patient care.