One thing not mentioned yet is that HTML offers this since the earliest days, and already visited links have at least another color.

The effect is subtle², since I'm a bit color blind, but I'm pretty sure one just needs to adjust the CSS settings⁴ for "visited" (?) to change colors or other attributes.

Dunno the right CSS code for that, but other monks and search engines might help.¹

Disclaimer: this won't help if you use multiple browsers tho.³

Cheers Rolf
(addicted to the Perl Programming Language :)
see Wikisyntax for the Monastery

Edits/Updates
¹) "visited" it is: https://developer.mozilla.org/en-US/docs/Web/CSS/:visited

²) and probably watered down by color settings for different creation dates.

³) and you'll have to open each post individually for them to be "visited"

⁴) in Display Settings or RAT Style Settings . Additionally Newest Nodes Settings might be of interest too.

In reply to Re^4: Ability to mark specific "newest nodes" nodes as read (CSS :visited) by LanX
in thread Ability to mark specific "newest nodes" nodes as read by Danny

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.