Colour Changes in FB Images

[andys73103220]

Not sure where or how the error is coming in. I convert tif images to jpg for FB. 

The pic looks great on the iMac and if I print it. However often the image looks too dark when viewed on a phone and lately there is a colour shift being caused somewhere. Sky blue will change to a magenta cast as per attached pics. Resaving the jpg from tif will often not pick up the colour cast. I am using Photoshop Beta and Topaz (purely for sharpening) 

I also find I can no longer open an image in DeNoise on its own, the software just hangs.

Retina 4k, 21.5", 2017. Ventura 13.6, 32Mb RAM, 2Tb SSD.

[Ken Curtis]

Facebook is notorious for not properly reproducing color correctly. They have a very lossy compression algorithm to minimize the file sizes they need to save. What I do before posting a JPG image is to increase the image saturation and I save at 80% quality. That helps. As far as images being dark on your phone, that probably means you have your computer monitor set too bright. Do you calibrate your monitor. I also use Topaz's DeNoise AI to remove noise, but it is a Photoshop filter. I never use it as a stand alone program. I use it as the first step after bringing an image into Photoshop and before doing anything else. It works well.