Lighthouse Accessibility score
The Accessibility score, from 0 to 100, shows how well a page did in Lighthouse’s automated accessibility checks. They look for things that make a page hard to use for people who don’t see well, use a screen reader or navigate with the keyboard: text with too little contrast, images without a description, buttons and form fields without a name.
Why it matters
Section titled “Why it matters”Every visitor should be able to read the page, understand the buttons and fill in the forms. For people with impaired vision or motor skills, small things decide whether that works: a link that says only “click here”, a form field without a label, light gray text on white.
A high score is a good sign, but it doesn’t prove that a page is accessible. Automated checks find only part of the problems. Whether the order of headings makes sense, whether an image description actually describes the image, or whether a menu works with the keyboard needs a person to check.
Each check counts fully or not at all: if ten buttons have a name and one doesn’t, the check fails. More serious problems weigh more. Manual checks listed in the report don’t affect the score.
What influences it
Section titled “What influences it”Browser: The most common problems on the web are text with too little contrast against its background and images without a text description (alt text). Both are found on more than half of all home pages (see Reference values).
WordPress: The theme decides colors, the menu and most of the page structure, so it has the biggest influence. Alt text comes from the Media Library and the editor; images added without one fail the check. Form plugins, sliders, cookie notices and embedded content add their own buttons and fields, and not all of them label them.
In Permo
Section titled “In Permo”Permo shows the Accessibility score as a small ring under Other categories on its PageSpeed page, from the same test as the Performance score. Its trend arrow appears from a change of 1 point, because unlike the Performance score, this score barely varies between tests; it only changes when the page changes.
Reference values
Section titled “Reference values”According to the WebAIM Million 2026 report, the most common automatically detected problems on home pages were low-contrast text (83.9% of pages) and images without alternative text (53.1%) (source: WebAIM Million, accessed October 16, 2026).