bbpress uses much of the theme characteristics so if the theme is compliant then bbpress should be there.
you can also use my style pack
https://wordpress.org/plugins/bbp-style-pack/
to style to get improved fonts etc.
@maryt66
bbPress needs some more work to be more accessible to visually impaired users. There are some tickets in the bbPress trac for bbPress for adjusting things like the breadcrumbs markup, notices markup, and some heading changes, etc.
A lot has been suggested for improvements from this gist and I think there could be some other improvements regarding admin link markup, topic status labels, and just having a horizontal layout might be better in the end for users.
Robins plugin I think won’t really help in most of these areas and won’t really make your forums moer accessible, I think only a possible contrast issue in one area at best is what his plugin can help with.
We would love have full WCAG 2.0 compliance 🙂
Our open tickets for further improvements are here: https://bbpress.trac.wordpress.org/query?status=assigned&status=new&status=reopened&component=General+-+Accessibility&order=priority
We will also follow WordPress’ lead and any initiatives by the accessibility team
https://make.wordpress.org/accessibility/
There is also the accessibility team handbook: https://make.wordpress.org/accessibility/handbook/
For bbPress much of what is needed right now is testing of our open tickets to make sure we are on the right track, any help would be graciously welcome 🙂
Thanks all for your answers – very helpful. It looks like you are trying to move towards accessibility. I’ll be happy to help with testing if my client decides to go ahead.