Selective Font Color Customization: How to Modify Text Color for Specific Elements

Is there any way to change the font color of the text below, where it says Home, Brand Strategy, Help Center, but keep the text above in white font color? I've been experimenting with using a JSON file to change the theme and hexadecimal values, but when I change the color of the text, it changes throughout the entire site. Is there a way to achieve this?