I often find it hard to differentiate between links using Vector's default colours for visited: and unvisited links. My contrast analyser tool, CCA, tells me the difference between them fails WCAG's "AA" level test for contrast.

I know I can fix this with a local style sheet, but presumably it affects other users, too.

See discussion and comparison chart at: https://en.wikipedia.org/wiki/Wikipedia:Village_pump_(technical)/Archive_171#Contrast_between_visited_&_unvisited_links