Change the stabdard text color

I need help in order to change the color to standard black for the text of pages/articles.
Thank you

I hope you are well today and thank you for your question.

You can try achieving this by adding the following CSS code in the Custom CSS option of your theme on the below path.

Admin Area -> Appearance -> Customize -> Additional CSS

/*change font color*/
h1, h2, h3, h4, h5, h6, p{

Best Regards,