custom.css

.seb li {
    padding: 10px 50px;
    border-radius: 10px;
    display: flex;
    align-content: center;
    justify-content: center;
    color: #fff;
    margin: 2px;
}

.seb h2, .grad {
    color: #ddd;
    background-image: -webkit-linear-gradient(
            left, rgba(0, 0, 0, 0) 0%, rgba(0, 0, 0, 0.4) 50%, rgba(0, 0, 0, 0.0) 99%
    );
}

.seb blockquote {
    color: white;
}

.darkgrad {
    color: #ddd;
    background-image: -webkit-linear-gradient(
            left, rgba(0, 0, 0, 0) 0%, rgba(0, 0, 0, 0.6) 23%, rgba(0, 0, 0, 0.6) 77%, rgba(0, 0, 0, 0) 99%
    );
}

.radgrad {
background: radial-gradient(ellipse at center, rgba(0,0,0,1) 0%,rgba(0,0,0,0) 60%); /* W3C */
    padding:100px;
}
.green {
    background-color: rgba(10, 245, 40, 0.7);
}

.blue {
    background-color: rgba(0, 56, 245, 0.7);
}

.violet {
    background-color: rgba(198, 0, 255, 0.7);
}

.gray {
    background-color: rgba(0, 0, 0, 0.27);
}