Then there's ultraviolet light.

The Blue System. The Violet. It's all there.

If all of the ozone were removed from the atmosphere, the amount of UVB radiation would equal the amount of UVA radiation on the ground.

Periwinkle is a color in the blue and purple family.

Carlos Garcia ( carlosgarciareq) and Mirian de Aristimuño ( MiriamJSdeA) presented their fingers painted in violet under the hashtag yavote (I already voted)

Violet and purple can contribute to the overall beauty of the color, while green is considered to be distinctly negative.

In the case of silicon, the majority of visible light from red to violet has sufficient energy to make this happen.

This design was used in the Green Grass weapon, also known as the Interim Megaton Weapon, which was used in the Violet Club and Yellow Sun Mk.1 bombs.

However, stratospheric ozone destruction in the polar regions and the consequent rise in dangerous ultraviolet radiation is still occurring at near record levels.

The ozone layer in the stratospheric layer of the atmosphere protects life on earth from the harmful effects of certain wavelengths of the sun's ultra violet light.

Bank notes are issued in denominations of 10 (brown), 20 (green), 50 (blue), 100 (red), 500 (purple) and 1,000 (grey) baht.

He observed that the exposed chemical would sometimes take on a pale version of the color of light that exposed it, and also reported the action of light for a considerable distance beyond the violet end of the spectrum.

At night, a large cube of light above the lobby also emanates blue light, while during the day it provides white light to the lobby, and at dusk it transitions to violet and back to blue.

Appearance The violet 405 nm laser (whether constructed from GaN or frequency doubled GaAs laser diodes) is not in fact blue, but appears to the eye as violet, a color for which a human eye has a very limited sensitivity.

The ultra violet light to produce these effects may be obtained from an arc lamp, or by burning magnesium, or by sparking with an induction coil between zinc or cadmium terminals, the light from which is very rich in ultra violet rays.

Semiconductor lasers with blue beams are typically based on gallium(III) nitride (GaN violet color) or indium gallium nitride (often true blue in color, but also able to produce other colors).

Under the hashtag NoEsUnaColaEsUnCamino (it is not a queue, it is a road) that makes reference to Henrique Capriles' slogan there's a road many Twitter users shared pictures of the voting centers, the long queues, cheering messages, and fingers painted in violet ink which confirms without doubt that someone voted.

Just in case you think that all yellow flowers have this property no flower was damaged in the process of this shot it was just attached to the tripod, not killed then under ultraviolet light, look at that.

When pointed at many white objects (such as white paper or white clothes which have been washed in certain washing powders) the visual appearance of the laser dot changes from violet to blue, due actually to fluorescence from brightening dyes.