Hi Ari,
Thanks for posting back.
According to your description, my understanding is that you want to keep the original color of the fonts after applying conditional formatting to the cells.
You may try the followings to check the outcome:
When applying conditional formatting, in the Format Cells dialog box>Font, Do Not Manually change the color to Automatic, instead, click the Clear button, then it will change the color to Automatic.
Then click OK to check the outcome.
Based on my test, the font color won't change to black with the steps above.
If above doesn't help, please let us know your Office version and Mac version for further troubleshooting.
Regards,
Tina