Sometimes they appear light pink, sometimes they appear aubergine. How does it work?
A picture is currently appearing on social media and is surprising many users because depending on how you open it or where you look at it, the nails and mouth appear in a different color.
Is it a trick? Is it dangerous to look at the picture? How can this even work? We will investigate all of these questions and explain why the nails and mouth always appear in different colors. It is exactly this picture:
And? What do you see? Light pink, right? Now just click on this picture. Exactly the same image, the same file opens. What do you see then? Correct. They appear aubergine colored.
No danger!
First of all: NO, looking at this picture is completely safe. Really. This is not magic or a virus, but a completely normal and correctly functioning property of the image.
Do nails and mouth really change color?
If you take it VERY seriously, neither the nails nor the mouth change color. Because technically speaking, they have transparency. Not complete transparency, but a certain percentage transparency. The only color that changes is the background. And depending on the background color, the nail also appears in a different color.
The real image looks like this, the chessboard-like fields indicate that this image is transparent in exactly these places, i.e. it behaves transparently like glass:

You can see that the transparency retains a very slight red shimmer, so it is not 100 percent transparent. Therefore, the background color + the remaining color of the transparency are always mixed. If the screen background is white, the nails and mouth are light pink, and if the background is black, they are amber-colored.
GIF or PNG
However, not every image file can be displayed transparently. Transparency in the network can contain the image formats GIF or PNG, but not the classic JPG format. Therefore, this trick does not work with images uploaded to Facebook, for example, because Facebook automatically converts PNGs into JPGs. On Twitter, it works great because Twitter adopts the PNG unchanged.
Reu-Up:
Headbutt today at #Mimikama ! What color is my #car ?
Click on the image and then decide. #MondayMotivation pic.twitter.com/YmHo0ltVv6— Andre Wolf (@AndrevonZDDK) October 22, 2018
The transparency works just as wonderfully in Facebook Messenger, as it displays PNGs.
Color games on WhatsApp
By the way, WhatsApp generally converts PNGs into JPGs, so this image shouldn't have worked that way on WhatsApp. However, the whole thing actually works to a certain extent on WhatsApp. Here it must have somehow been possible to upload the PNG disguised as a JPG (when you save the file, it appears as a JPG, but is actually a PNG file). The effect therefore always remains if you FORWARD the image (do not share or re-upload). When forwarded, the effects remain unchanged. We don't know how, but we would be grateful for any information.

Depending on the background, the nails and mouth appear in the corresponding color. You can clearly see the transparent areas, especially in the version with a green background.
Ergo
How the supposed color change works is no secret, but is due to the transparency of the image.
However, how this image can work on WhatsApp and how it could be uploaded WITH the transparency feature remains a mystery.
By the way: the fact that the color changes to blue when you forward this to 10 friends is a fake.
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Notes:
1) This content reflects the current state of affairs at the time of publication. The reproduction of individual images, screenshots, embeds or video sequences serves to discuss the topic. 2) Individual contributions were created through the use of machine assistance and were carefully checked by the Mimikama editorial team before publication. ( Reason )


