Thank you Yigit, what developer tools do you suggest?

Hello, I’ve done some trial and error on my own and managed to get it:
1. Add a custom css style to the custom menu link (eg. about-scroll)
2. In the custom styling css section in the options panel, put in the following:
.header_color .main_menu ul:first-child > li.about-scroll.current-menu-item > a {color: #333333;}
.header_color .main_menu ul:first-child > li.about-scroll > a {color: #808080;}

This is currently what I can do with css, if anyone has a better more user friendly way please post, thanks!