.col {
    margin-bottom: 10px;
    background: linear-gradient( to right, rgba(0, 0, 0, 0), rgba(0, 0, 0, 0) calc(100% - 15px), #fff calc(100% - 15px) ), linear-gradient(to right, #fff, #fff 15px, rgba(0, 0, 0, 0) 15px), linear-gradient(to right, #eeeeee, #eeeeee);
}