Here's what the "Web Content Accessibility Guidelines" (WCAG) recommend about links and underlines:

Using a contrast ratio of 3:1 with surrounding text and providing additional visual cues on hover for links or controls where color alone is used to identify them

...The intent of this technique is to provide a redundant visual cue for users who may not be able to discern a difference in text color....
...While using this technique is sufficient to meet this success criterion, it is not the preferred technique to differentiate link text. This is because links that use the relative luminance of color alone may not be obvious to people with low vision. If there are not a large number of links in the block of text, underlines are recommended for links in blocks of text...

More here:
https://www.w3.org/WAI/WCAG21/Techniques/general/G183

And this article describes some ways to add underlines that are less "distracting":
https://css-tricks.com/styling-links-with-real-underlines/

Two examples:

a {
  text-decoration: none;
  border-bottom: #EA215A 0.125em solid;
}

a {
  text-decoration-color: #EA215A;
  text-decoration-thickness: .125em;
  text-underline-offset: 1.5px;
}

Sierk

On Sun, Jun 26, 2022 at 2:18 PM Jake via sudo-discuss <sudo-discuss@sudoroom.org> wrote:

thank you for doing that! would you prefer a different font size or style,
rather than underlines?

I don't know what other client features you're talking about

On Sun, 26 Jun 2022, Yardena Cohen wrote:

> I made the requested change with this edit:
> https://sudoroom.org/mediawiki/index.php?title=MediaWiki%3ACommon.css&type=revision&diff=12027&oldid=12021
>
> Personally l do not like this change and would prefer it the other
> way. I am colorblind myself but I can tell easily enough what's a link
> using other client features. To me, having excessive lines all over
> the place is more of an accessibility issue than slightly more
> ambiguity about what is a link.
>
> On Wed, Jun 15, 2022 at 6:11 PM Jake via sudo-discuss
> <sudo-discuss@sudoroom.org> wrote:
>>
>> hi, does anyone know how to make it so that the wiki underlines all links?
>> It's nearly impossible to see links without that, unless you really expect
>> people to see the difference between black and dark blue which is ableist.
>>
>> I opened this file but all the things i tried did not do anything to cause
>> links to be underlined. I think both internal and external links should be.
>>
>> https://sudoroom.org/wiki/MediaWiki:Common.css
>>
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