Skin-colored, white, or yellow
- Skin tag (acrochordon)
- Warts
- Basal cell carcinoma
- Squamous cell carcinoma
- Sebaceous (epidermal inclusion) cyst
- Lipoma
- Xanthoma
- Molluscum contagiosum
- Nevus (intradermal)
- Sebaceous hyperplasia
- Milia
- Keratosis pilaris
- Granuloma annulare
- Rheumatoid nodules
- Gout
- Sarcoidosis
- Calcinosis cutis
- Metastases (color variable)
- Calluses or corns
- Gummas (tertiary syphilis)
- Sporotrichosis
- Foreign-body granuloma
Brown
- Seborrheic keratosis
- Nevus (compound, intradermal)
- Melanoma
- Dermatofibroma
- Neurofibroma
Red
- Insect bites
- Acne vulgaris
- Cherry angioma
- Hemangioma
- Folliculitis
- Inflamed sebaceous (epidermal inclusion) cyst
- Furuncle
- Scabies
- Erythema nodosum
- Basal cell carcinoma
- Keratoacanthoma
- Prurigo nodularis
- Miliaria (heat rash)
- Urticaria
- Sporotrichosis
Blue, violaceous, or purple
- Vasculitis (palpable purpura)
- Lichen planus
- Melanoma
- Kaposi's sarcoma
- Blue nevus
- Venous lake
- Mycosis fungoides (cutaneous T cell lymphoma)
- Endocarditis (Osler's nodes)