Chart.js/docs/style.css

a.anchorjs-link {
    color: rgba(65, 131, 196, 0.1);
    font-weight: 400;
    text-decoration: none;
    transition: color 100ms ease-out;
    z-index: 999;
}

a.anchorjs-link:hover {
    color: rgba(65, 131, 196, 1);
}

sup {
    font-size: 0.75em !important;
}