.switch {
    position: relative;
    display: inline-block;
    width: 80px;
    height: 25px;
}

    .switch input {
        display: none;
    }

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #d6d5d5;
    -webkit-transition: .4s;
    transition: .4s;
    border-radius: 34px;
}

    .slider:before {
        position: absolute;
        content: "";
        height: 20px;
        width: 20px;
        left: 4px;
        bottom: 2px;
        background-color: white;
        -webkit-transition: .4s;
        transition: .4s;
        border-radius: 50%;
    }

input:checked + .slider {
    background-color: #47555E;
}

input:focus + .slider {
    box-shadow: 0 0 1px #2196F3;
}

input:checked + .slider:before {
    -webkit-transform: translateX(26px);
    -ms-transform: translateX(26px);
    transform: translateX(55px);
}

/*------ ADDED CSS ---------*/
.slider:after {
    content: 'Hex';
    color: white;
    display: block;
    position: absolute;
    transform: translate(-50%,-50%);
    top: 50%;
    left: 50%;
    font-size: 10px;
    font-family: Verdana, sans-serif;
}

input:checked + .slider:after {
    content: 'Dec';
}

/*--------- END --------*/