armajirou

I tried the another test. I captured a screenshot with cmd-shift-4 when there is not Dell profile in the /Library/ColorSync/Profiles/Displays folder. And after drug and drop the screenshot file to Affinity Photo document, I confirmed that the color is R:256, G:0, B:0 with Color Picker Tool. Then I put the Dell profile in the /Library/ColorSync/Profiles/Displays folder again from backup, and restart Affinity Photo. And drug and drop the same screenshot file to Affinity Photo document. Color Picker Tool showed R:235, G:66, B14. So as >|< said, the color change happens when a screenshot is added to the document in Affinity with Dell profile. And whether the problem occurs or not depends on existence of the Dell profile clearly.

I put the profile( "DELL 19....icc") in the /Library/ColorSync/Profiles/Displays folder again from backup, and the problem reproduced after restarting Affinity Photo.

Removing the profile solved my problem! The problem does not happen with the Display Profile set to "iMac". Thank you so much

Oh, I see. I found it! Should I remove the file named "DELL 19....icc"? I think it was created when I previously connected the sub display to Mac. And I don't use it.

>|< I can't find directory "ColorSync" in Library. Am I looking for a different place? Althogh the language is Japanese, I post a screenshot of my Library.

Hi >|<, Thanks for your information. Is the problem caused by MacOS? On my machine, this problem does happen when using MacOS10.14.4. How is the color profile of your Affinity document set when the problem does not happen on your Mac with macOS10.13.6? If changing the display settings causes another problem, I will return the setting to "iMac". Changing settings only when capturing screenshots seems to help me avoid the problem. I hope the problem is resolved with the next OS update.

As you guessed, the Color Profile settings were different. On my iMac, Display Profile set to "iMac". The problem was solved by setting to sRGB 2.1. Thanks for your help

To add, I made the first red box using Rectangle Tool on Affinity Photo.

Hi Lee D I use shortcut shift+command+4 when capture screenshot. And paste it by command+v on Affinity Photo. I repeated capture and paste to make it easy to feel the color change caused by pasting screenshots. I tried same steps on my MacBook Pro 2013 but this problem did not occur.

Hi, I have a trouble with screenshots taken using MacOS screenshot tools on iMac 2017. The color changes slightly when pasting screenshots into the documents on both Affinity Photo and Designer. This issue is not occur on my MacBook pro 2013. My OS version : MacOS 10.14.4 Affinity Photo version :1.6.7 Is there way to solve it? Thank you for any help.