Change color of individual navitem

Site URL: https://www.jazzmaastricht.com/

Is it possible to change the text color of just one navitem? I want to change the color of a single navitem, NL/EN which changes the language. I managed to get it done using the inspector tool in Chrome but I can't seem to select the item via css.

Add to Home > Design > Custom CSS

.header-nav-folder-title[href="/lang"] {
    color: red !important;
}