| Adverse Effects and Toxicity | Blue | Hypersensitivity and Contact Dermatitis | Allergy (124); Allergic Contact Dermatitis (59); |
| Purple | Infection and Carcinogenesis | Infection (77); Complications (71); Melanoma (69); Skin (61); Cancer (59) |
| Brown | Sarcoidosis and Granulomatous Reactions | Sarcoidosis (98) |
| Red | Toxicity and Epidemiology | - |
| Pink | Exacerbation of Skin Diseases | - |
| Medical Tattooing | Sky Blue | Gastrointestinal Endoscopic Tattooing | - |
| Green | Medical and Breast Reconstruction Tattooing | Breast Cancer (53) |
| Orange | Corneal Tattooing | - |
| Pink | Vitiligo Treatment | - |
| Laser Tattoo Removal | Yellow | Laser Tattoo Removal | Laser (89); Tattoo Removal (81); Picosecond Laser (73) |