How do some images on twitter change colors when saved/opened?

Question

https://imgur.com/a/F1Y3Pla

First picture is the post explaining
second picture is a screenshot of the picture off twitter
third picture is the saved picture

in my gallery, the paint on the hand is white, but on imgur, the paint is darker.

original post: https://twitter.com/itsthatitboyy/status/1165314744124755968?s=21

In: Engineering

Answer 1

That portion of the image is actually transparent, as a result the color you’re seeing is the background of whatever app/platform you are viewing it on.

It should be noted only certain file types are capable of this.