hookshot/1.1.0/_site/style.css

.notice {
    color: black;
    border: 2px solid #0098d4;
    border-left-width: 2px;
    border-left-width: 5px;
    background: #e5f5fb;
    padding: 10px 20px;
}

.notice::before {
    content: "INFO: ";
    font-weight: 700;
}

.warning {
    color: black;
    border: 2px solid #dda02f;
    border-left-width: 2px;
    border-left-width: 5px;
    background: #fdcd74;
    padding: 10px 20px;
}

.warning::before {
    content: "WARNING: ";
    font-weight: 700;
}