Email scan documents ends up blue tint

Saybark wrote:

iPhone 12: using an email to scan documents and they end up in blue tint. Could not rid of it. What do I do?

Most likely it is a result of the color of the ambient light source. LEDs have a wide range of colors, and fluorescent lights tend towards the blue end of the spectrum.

To add to Lawrence's notes, there's also the paper itself. The brighter white a paper is rated, the more UV brighteners it has in it. This makes the paper both a brighter white and bluer.

But that isn't all. Our brains love to try and neutralize what we know is supposed to be white, gray, or any shade between white and black. Cameras don't do this, or at least not well. And they tend to over-exaggerate UV, which being on the violet end of the spectrum, comes back as a purplish blue.

A well known example of this is the instance of a white horse standing in the shade under a bunch of trees, and on the grass. We see what we expect to see - a white horse - because our brains discount most of the reflected green color around it. A camera will show you a greenish colored horse.