Hello @vscpp ,
Welcome to Microsoft Q&A forum.
Please first click Tools > Options > Environment > Fonts and Colors > Display items > scroll down, find and select Operator
> on the right, check Item foreground
option, set it to Default or other colors that you want. I am guessing if it was set to Black, maybe by mistake(from update).
You can also try to reset VS settings by clicking Tools > Import and Export Settings… > select Reset all settings > Next > Select No, just reset settings, overwriting my current settings > Next > General > Finish.
Besides, are you using any extensions which may affect fonts and colors? If so, please try to disable them temporarily.
Sincerely,
Tianyu
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