Can't change active menu link color

Hi, I’ve been reading all the previous discussions on this topic I can find, and none of the suggestions are working for me! I’ve tried to find answers but the manuals don’t seem to help either.

My one pager site https://www.robinsongroupelectric.com has it’s main menu stuck with one of the three links always active and always a weird orange colour.

I’ve tried putting in the following code in both the Theme Code area and the theme file editor area.

.fl-page-nav-right .fl-page-nav-wrap .navbar-nav > li.current-menu-item > a {
color: #fff;
}

it doesn’t help. Anyone have insight? I"m sure it’s me, I’m not an expert.

Thanks
PG