How to Ensure WCAG 2.1 Compliance for Accessibility on Webflow?

WCAG 2.1 (Web Content Accessibility Guidelines) is the accepted standard for web accessibility. It's organized around four principles: Perceivable, Operable, Understandable, and Robust — POUR. Understanding these principles is more useful than memorizing individual rules, because they explain the why behind each requirement.

Perceivable: information must be presentable in ways users can perceive. This covers alt text for images, captions for video, sufficient color contrast, and not relying on color alone to convey information. If removing all color from your page makes it incomprehensible, you're relying on color alone.

Operable: the interface must be navigable by different input methods. All functionality must be available without a mouse. No content that flashes more than three times per second (seizure risk). Enough time to interact with time-sensitive content. Webflow's Interactions can create problems here — animation triggers that require hovering or specific mouse movements aren't operable for keyboard users.

Understandable: content must be readable and predictable. This includes the lang attribute on your HTML (Webflow sets this correctly if you configure the site language in settings), consistent navigation across pages, and clear error identification in forms. A form error that only turns an input red without a text explanation fails this criterion.

Robust: content must be interpretable by current and future assistive technologies. This is largely about using semantic HTML (which Webflow's native elements support) and ARIA correctly. Custom UI components built with divs instead of buttons or inputs often fail here.

Compliance level: WCAG has three levels — A (minimum), AA (standard), AAA (enhanced). Most legal requirements target AA compliance. Full AAA is difficult for most general-purpose websites.

Monthly approach: rather than auditing everything at once, rotate through the four principles. Month 1: check all alt text (Perceivable). Month 2: keyboard test (Operable). Month 3: review forms for error clarity (Understandable). Month 4: run Lighthouse accessibility audit (Robust). Four months, then repeat with fresh eyes.