having at least the crawl http status code would be nice as color
In that case, we should keep the current existing legend and just split the "CRAWLED PAGES" one into 2 or 3 colors for Successfully crawled (2xx), Crawled with error (4xx 5xx), and maybe Crawled with redirection (3xx) (or merge that last one into success)
Also, including startpages into that coding would make sense, in which case, they could be notified with a picto or a border instead of a dedicated color.