Excel copy paste in outlook not show color

I have also tried that with copying on microsoft word but still its not working but only for red and yellow color. For all other colors its working completely fine.

i copied excels to microsoft outlook and i couldnt copy them with yellow color.

This issue happens in Word when pasting. Pasting as picture shows correct colors. Pasting in Dark Mode makes the red and yellow change hue, green and blue unaffected.

I have multiple computers with the problem but no specific pattern can be found:

1. Windows 10 Pro / Office 2019. Computer used daily for 1 year, problem started happening "couple weeks ago" per end user. Computer is not supposed to update. Copy and paste is broken. Repair install of Office did not work.
2. New PC. Came with Windows 10 Pro and Office 2021. Did all Windows (went to 11) and Office updates YESTERDAY and copy paste is broken. Was used for another diagnosis issue and just went and checked it for this issue. Uninstall and reinstall of Office did not fix.
3. Newish PC. Came with Windows 10 Pro and Office 2021. Did all Windows (went to 11) and Office updates in December and disabled updates. Checked machine and copy and paste is broken. Machine used daily.
4. PC on Shelf. Came with Windows 10 Pro and Office 2021. Did all Windows (went to 11) and Office updates in December and disabled updates and put on shelf. Turn on PC, copy and paste worked. Did all Windows and Office updates today and IT STILL WORKS FINE. Switched to Black Mode and red and yellow have changed hues, switching to white makes the color correct.

I am also having issues copying from excel to outlook. Colors do not show up at all or are not accurate when using paste as a picture.

I had tried all the possible solutions. But no luck.

Can someone offer any solutions?