updating Section CSS Class

I have to update the about-me class on one of the sections so the type is white instead of black. I tried a number of ways to get this to work, but haven't found a solution. Please explain in detail how I can accomplish my goal. This is what I've tried: I added a new class to the Custom CSS on the basic settings page: .about-me-white body p {color: #ffffff;} Then added #about-me-white to the Section CSS Class in the section, it did not work. I also tried .about-me-white in the Section CSS Class, it did not work. I added .about-me-white body p {color: #ffffff;} to the Section CSS Class in the section, with nothing in the Custom CSS on the basic page. It didn't work. I added .about-me-white body p {color: #ffffff;} to the Custom CSS on the basic settings page and left the Section CSS Class blank. It didn't work. Please provide an example of how it should work. Thanks.