After a minute in the sun (or longer if there is cloud coverage), the stickers should turn from a dark purple to clear. A clear sticker means that you are protected.

The stickers are a dark-purple right out of pack. Then you’re supposed to apply them to your skin, in a spot that will be easily exposed to the sun. I usually put them on my arm or wrist.

A dark purple spot means it's time to reapply ASAP. My experience with the SpotMyUV UV Detection Stickers The spot changes color once you apply sunscreen over it.

This new purple decal is set to go in effect on January 1, 2019 and remain valid until January 1, 2023. This actually gives commuters one extra year on top of previous legislation that allows ...

California electric-car drivers have a new color to keep track of. Starting New Year's Day 2019, the state will issue updated Clean Air stickers that allow electric cars purchased after January 1 ...

Glow in the Dark Keyboard Stickers [BaronBob.com via Foolish Gadgets] Topics. Hardware, Headline, Keyboards. Contributor View Bio . October 27-29, 2025. San Francisco.

Everything you need to know about the stickers flocking to your timeline. ... Introducing Trash Dove: The Floppy-Necked Purple Bird Taking Over Facebook. By Madison Malone Kircher. Feb. 15, 2017.