The polish-pass fallacy
Treat accessibility as a final coat of paint and it never gets applied. By the time the page is built, the markup is a wall of interchangeable divs, the focus order is scrambled, and the fixes have quietly grown from small edits into structural surgery. Everyone means to get to it. Almost no one does.
The reason is structural, not moral. An accessible interface is one whose structure carries meaning — headings that nest, controls that announce what they are, state that is legible to software as well as to the eye. You cannot brush that on at the end, because it is not paint. It is the skeleton, and the skeleton goes in first or not at all.
What the standard actually asks
Most of it is unglamorous and entirely learnable. Use the element that means what you mean — a button for an action, a link for a destination, a heading for a heading. Make every interaction reachable and operable from the keyboard, in an order that matches the page. Give text and its background enough contrast to read, and check that contrast in light and in dark, because a ratio that passes on one theme can fail on the other.
None of this is a matter of taste. The Web Content Accessibility Guidelines set contrast ratios, focus behaviour, and name-role-value rules as concrete numbers and conditions — things a person or a tool can check and either pass or fail. "Looks accessible" is not a state anyone can defend. "Meets AA" is.
Verifiable, not vibes
Because the standard is concrete, it can be tested like anything else that matters. An automated pass catches the mechanical failures — missing labels, thin contrast, broken landmarks — and a keyboard-only walk of the page catches the rest, the traps and dead ends a machine happily reads as fine. Both run before a change ships, not after a user has to file a complaint to be heard.
That discipline runs through every surface we build, our own products included — Koryvant renders every screen in both themes with real focus states, because the prototype is meant to be verifiable, not merely pretty. If you want the same bar held on software built for you, that is what custom web application development means here: accessibility as a requirement written into the work, not a favour done at the end.