Removing Navigation fom Single Page

Site URL: https://www.aksm.org/brooks

Our designer doesn't like the color of the text on this page and after thinking about it, we don't believe we can change the color of the nav. bar on a single page so we are just trying to remove it unless the color change is an option. We tried inserting codes we found on the forum but non have worked. Any help would be greatly appreciated!

Add to Home > Design > Custom CSS

.Header-nav-inner {
    visibility: hidden;
}