website/web/static/css/theme-red.css

:root {
    --bulma-primary-h: 15deg;
    --bulma-primary-l: 63%;
    --bulma-link-h: 12deg;
    --bulma-link-l: 30%;
    --bulma-scheme-h: 0;
}

/*
 * Forum Colors: with all the nested boxes, Bulma's default color scheme is
 * too limited for a good experience.
 */
 .nonshy-forum-box-1 {
    /* Outermost box: Forum or Thread top-level wrappers */
    background-color: #ffd1d1;
}
.nonshy-forum-box-2 {
    /* Nested box: "Latest Post" on Forum-level views */
    background-color: #f1d8d0;
}
.nonshy-forum-box-3 {
    /* Nested box: Topics/Posts/Users/View counters */
    background-color: #ffd0c2;
}

/* Chat members in top nav bar on desktop */
.nonshy-navbar-notification-tag.is-link {
    background-color: rgb(255, 66, 66);
    color: #fff;
}