Can't change CSS in wpmudev

Hello,

I want to change the font color of:

#wpwrap .wpmui-field-label, body .wpmui-field-label {
    clear: both;
    color: #222;
    display: block;
    font-style: normal;
    margin: 2px 0;
}

in to

#wpwrap .wpmui-field-label, body .wpmui-field-label {
    clear: both;
    color: #47d3ff;
    display: block;
    font-style: normal;
    margin: 2px 0;
}

problem is wont affect. I assume it's because versioning your css in wpmudev.

the css file which I'm talking about is under:
http://ramar.space/wp-content/plugins/custom-sidebars/inc/external/wpmu-lib/css/wpmu-html.3.min.css?ver=4.6.1

when I change it into what I want as described above, nothing happens :slight_frown:

Please help :slight_smile:

Kind regards,
Roger