CODE EXAMPLE FOR CSS

Slick slider and ACF Pro in WordPress

/* Slick slider */
.slick-track > div {
    margin-right: -20px !important;
}
.slick-prev, .slick-next {
    font-size: 0;
    line-height: 0;
    position: absolute;
    top: 50%;
    display: block;
    width: 20px;
    height: 20px;
    padding: 0;
    -webkit-transform: translate(0, -50%);
    -ms-transform: translate(0, -50%);
    transform: translate(0, -50%);
    cursor: pointer;
    color: teal !important;
    border: none;
    outline: none;
    background: transparent !important;
}
.slick-prev:hover, .slick-next:hover {
    color: teal !important;
}
.slick-prev:before, .slick-next:before {
    font-family: 'slick';
    font-size: 20px;
    line-height: 1;
    opacity: .95 !important;
    color: teal !important;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}