Most accessibility failures are usability failures with a narrower audience: an unclear error, a control that does not say what it does, a flow that assumes a mouse. Treating the two as one discipline gets you most of the way, and the places they diverge are worth naming because that is where teams that think they have covered it have not. This page is that overlap and that divergence, for designers and for the businesses paying them.
Where they are the same problem
Clear labels, visible states, errors that say what to do, consistent navigation, readable text and a sensible reading order. Every one of those is a usability principle that happens to be a WCAG criterion. A team with a strong usability practice usually clears half of an audit without having aimed at it.
Where accessibility asks for more
Keyboard operation of everything, programmatic names and roles for custom components, focus management across route changes, text alternatives for media, and reflow at 200% zoom. None of these are visible to a sighted mouse user, so none of them are caught by usability testing as it is normally run.
How to train a design team without a course
One hour: everybody tabs through the current product with the mouse unplugged and writes down where they get stuck. It is the exercise that changes how people design, because the failures are theirs and they are undeniable. On the worked example the manual pass an auditor charges 11 hours for starts with exactly this.
Questions people ask about accessibility ux design
Should accessibility be a separate design review?
No, it should be a section of the existing one. Separate reviews get dropped when a deadline moves.
Do we need to hire a specialist designer?
Usually not. You need the checklist in the review and one person who owns the component library.
What about user testing with disabled people?
It is the strongest signal available and worth budgeting for once a year, after the obvious failures are cleared.