@andythenorth : do you plan to tackle these issues yourself? Otherwise you should really add more information about the issues :) This ticket currently is not fixable by anyone.

I have no clue what WAVE is. If WAVE is free to use, a link to this could be sufficient.

Basically: anything more than "something is wrong" would be appreciated :D

I am planning to fix these, but not a priority for me.

If anyone else wants to resolve them:

• WAVE is a free validation tool from WebAIM https://wave.webaim.org/
• I use it via the Chrome plugin
• I run the OpenTTD website locally using jekyll serve, then check one page at a time
• the contrast checker sometimes gives spurious failures, as it can't always resolve the css hierarchy to work out what the user will actually see rendered, but it's generally a pretty good guide, and I tend to fix the CSS so all the errors are resolved, it's usually not much work.

I also ran W3C html5 validator over the front page of the staging site: https://validator.w3.org/nu/?doc=https%3A%2F%2Fwww.staging.openttd.org%2F

This shows a couple of issues that are quite easy to fix.

Seems the priority is this low, that it isn't being fixed ;) Going to close the issue now. If anyone wants to send in PRs, they are more than welcome!