The ultraviolet light of the sun will give you good color, but too much exposure can be dangerous.
ultraviolet helps give so types of flowers with light
A true "black light" should emit only ultraviolet radiation. Violet light waves have the highest frequency visible to a human eye. Ultraviolet has a higher frequency, and the human eye cannot detect it. When you buy a "black light" at the party store, in addition to the ultraviolet radiation, the bulb will usually give off violet light as well (analogous to a yellow light bulb looking a bit orange). You can see the violet light, but it's really the invisible, high energy ultraviolet light that provides all the "cool" effects.
The main form of electromagnetic radiation that give you a sunburn is Ultra Violet (UV) radiation. (UV rays) Ultra-violet is furthered graded to UVa UVb and UVc. UVa - is necessary for the production of Vitamin D UVb - is required for certain anti-cancer process in the skin. UVc - has no beneficial function and is the most energetic and responsible for the majority of the sun burn.
Exposure to natural starlight does not cause cancer. However, excessive exposure to artificial sources of light, such as certain types of ultraviolet light, can increase the risk of skin cancer. It's important to protect your skin from harmful UV rays by using sunscreen and avoiding prolonged exposure to direct sunlight.
The ultraviolet rays in sunlight destroy cells in the outer layer of the skin, damaging tiny blood vessels underneath. When the skin is burned, the blood vessels dilate and leak fluid. Cells stop making protein. Their DNA is damaged
Violet
Blue and red will give a near violet colour.
every action has a consequence.
A violet dress appears violet in sunlight because the dress absorbs most of the other colors in the sunlight spectrum and reflects back violet light. This selective absorption and reflection of light give the dress its violet appearance when viewed in sunlight.
The obvious answer is "Stars".
Salicylaldehyde will give a violet color with neutral ferric chloride.