/* Visited links ONLY inside RSS + Hacker News widget bodies */
.widget-type-rss .widget-content a:visited,
.widget-type-videos .widget-content a:visited,
.widget-type-reddit .widget-content a:visited,
.widget-type-hacker-news .widget-content a:visited {
    color: #ff00ff !important;   /* pick your color here */
}

/* Make sure headers keep their normal theme color */
.widget-type-rss .widget-header a,
.widget-type-rss .widget-header a:visited,
.widget-type-videos .widget-header a,
.widget-type-videos .widget-header a:visited,
.widget-type-reddit .widget-header a,
.widget-type-reddit .widget-header a:visited,
.widget-type-hacker-news .widget-header a,
.widget-type-hacker-news .widget-header a:visited {
    color: inherit !important;
}