Rock the Colorado Cosmetology Written Exam 2026 – Beautify Your Career Today!

In the context of nail disorders, melanin is not classified as a type of nail condition. Melanin is a pigment found in the skin, hair, and eyes, responsible for the color in those tissues. It does not describe a disorder or condition affecting nails, which is why this option is considered the correct answer in the context of the question.

Kolionychia, on the other hand, refers to a condition where the nails become concave in shape, typically due to various health issues. Onychia is an inflammation of the nail matrix, often leading to swelling and tenderness around the nail. Onychatrophia involves the wasting away or atrophy of the nail plate, which is classified as a nail disorder. In contrast, melanin does not pertain to any specific nail disorder, making it the correct choice for the question asked.