footer {
  padding: 20px 0;
}

.navbar-header .navbar-brand .logo {
    height: 40px;
    width: 200px;
    background-image: url('../img/logo-white.png');
    background-size: auto 40px;
    background-repeat: no-repeat;
    display: block;

    -webkit-transition: all 0.35s;
    -moz-transition: all 0.35s;
    transition: all 0.35s;
}

.affix .navbar-header .navbar-brand .logo {
    background-image: url('../img/logo.png');
}

.navbar-header .navbar-brand {
    margin-top: -10px;
    margin-bottom: -10px;
}
footer {
  padding: 20px 0;
}

.navbar-header .navbar-brand .logo {
    height: 40px;
    width: 200px;
    background-image: url('../img/logo.png');
    background-size: auto 40px;
    background-repeat: no-repeat;
    display: block;

    -webkit-transition: all 0.35s;
    -moz-transition: all 0.35s;
    transition: all 0.35s;
}

@media (min-width: 768px) {
    .affix-top .navbar-header .navbar-brand .logo {
        background-image: url('../img/logo-white.png');
    }
}

.navbar-header .navbar-brand {
    margin-top: -10px;
    margin-bottom: -10px;
}
Fix the color of the logo on mobile devices
Fix the color of the logo on mobile devices
