.gradient-custom {
    /* fallback for old browsers */
    background: #6a11cb;

    /* Chrome 10-25, Safari 5.1-6 */
    background: -webkit-linear-gradient(to right, #3b3b8f, rgb(56 120 227)););

    /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
    background: linear-gradient(to right, #3b3b8f, rgb(56 120 227));)
}

.modal-button:hover {
     color: black !important;
}