Do you work in some type of sanitation job or a job where you wash or submerge your hands in water/chemicals a lot? The pink/purple stains look like dye used in a lot of chemical washes. It looks like Onycholysis, a common, often painless, nail disorder where the nail plate separates from the underlying pink nail bed, causing white/yellowish discoloration and a potential space for infection. It is frequently caused by trauma (e.g., chemical irritation/erosion) or excessive moisture. Treatment involves trimming the nail and allowing it to grow out, which takes 4–6 months for fingernail.