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Accessibility

· 13 checks — Landmarks, headings, alt text, forms, and link quality rolled into one auditable list.
SCORE
60
GRADE
D
FIX
5
REVIEW
3
PASS
5
INFO
0
Checks
13
5 PASS 3 REVIEW 5 FIX
F
Favicon & Branding
Action
1 icon(s) detected
FIX
1 icon(s) detected
Warning::
No favicon.ico at site root
Some older browsers, bookmark tools, and RSS readers look for /favicon.ico. Add one as a fallback.
Info::
HTML icon links detected
Info::
No apple-touch-icon detected
iOS devices use this when users add your site to their home screen. Add <link rel='apple-touch-icon' sizes='180x180' href='/apple-touch-icon.png'>.
✗ favicon.ico Missing
✓ PNG Icons Present
✗ Apple Touch Missing
✗ SVG Favicon Missing
✗ Manifest Icons Missing
✗ Multiple Sizes Missing
D
Web Manifest
Action
Not found
FIX
Not found
Info::
No web manifest found
No manifest at standard paths (/manifest.json, /site.webmanifest). A manifest is optional but enables PWA features like home screen installation and standalone display.

No web manifest found.

D
Dark Mode Support
Action
Theme color only
FIX
Theme color only
Info::
Theme-color present but no dark variant
A theme-color is set but no dark-specific variant was found. The browser toolbar may not adapt for dark mode users.
Got: #ca3c32
Info::
No dark mode signals detected
Consider adding CSS with @media (prefers-color-scheme: dark) and <meta name='color-scheme' content='light dark'>.
Info::
Detection limited to meta tags and inline styles
External CSS files may contain prefers-color-scheme rules not visible to this scan.
Dark ModePartial Dark Mode
color-scheme meta Not set ✗Dark theme-color Not set ✗CSS indicators Not detected ✗

Detection limited to meta tags and inline styles.

D
Print Stylesheet
Action
No print styles
FIX
No print styles
Info::
No print-specific styles detected
When users print this page, they get the screen layout including navigation and non-essential elements. Add @media print rules to hide navigation and optimize layout for paper.
Print Stylesheet No Print Styles
Print stylesheet Not found ✗Inline @media print Not detected ✗
F
Navigation UX
Action
No navigation patterns
FIX
No navigation patterns
Info::
1 navigation landmark(s) detected
Info::
Hamburger menu detected (responsive design)
Info::
No breadcrumbs, search, or skip link detected
These navigation aids help users orient themselves and find content efficiently, especially on large sites.
Breadcrumbs
Search
Skip Link
Labeled Navigation 1 <nav> element(s)
Back to Top
Hamburger Menu
Sticky Navigation Cannot reliably detect (CSS-based)
2 of 6 testable patterns navigation patterns detected. Limited navigation support. Consider adding breadcrumbs, search, and skip link.
C
Landmark Structure
Action
2 landmarks
REVIEW
2 landmarks
Critical::
No <main> landmark found
Screen reader users cannot quickly navigate to the primary content. Wrap your main content in <main>.
Info::
1 <nav> landmark(s) found
Info::
No banner (header) landmark
Warning::
Skip navigation link is missing (WCAG 2.4.1)
Add a skip link as the first focusable element so keyboard users can bypass repeated navigation.
Page Structure — as a screen reader sees it
BANNER (missing!) NAV MAIN (missing!) CONTENTINFO footer

Screen reader users cannot quickly navigate to the primary content. Wrap your main content in <main>.

Why this matters

Without a <main> landmark, screen-reader users can't skip past the navigation to the page content — every page starts with re-reading the menu.

Learn more ▾

The <main> element marks the page's primary content area. Assistive tech offers a 'jump to main' shortcut — but only if <main> exists. Without it, every page navigation forces re-reading the header. Wrap your primary content in a single <main>.

Source: WAI-ARIA / WCAG 2.4.1

Add a skip link as the first focusable element so keyboard users can bypass repeated navigation.

Why this matters

Without a skip-nav link, keyboard users tab through every nav item before reaching content — every page, every visit.

Learn more ▾

WCAG 2.4.1 (Bypass Blocks) requires a mechanism to skip past repeated content. The standard implementation is a 'Skip to main content' link that's the first focusable element, visually hidden until focused. Three lines of HTML + four of CSS.

Source: WCAG 2.1 SC 2.4.1

B
404 Error Page
HTTP 404, custom page
REVIEW
HTTP 404, custom page
Info::
Correct 404 status code returned
Got: HTTP 404
Info::
Custom styled 404 page
Info::
Navigation links present on 404 page
Info::
Homepage link present on 404 page
404 Page Quality ✓ Custom 404 Page
Status Code HTTP 404 ✓Page Title Page Not Found ✓Custom Styling ✓Navigation ✓Homepage Link ✓Search Form ✗
B
Lighthouse Accessibility Audits
Score 89/100 — 4 failing, 23 passed
REVIEW
89

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

Contrast

Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
JuliaCon Global 2026 div.alert > p.text-center > span.alert-text > a
juliacon.org/2026 div.alert > p.text-center > span.alert-text > a
Watch JuliaCon 2025 ↓ div.alert > p.text-center > span.alert-text > a.watch-videos-link
julia> div.code-showcase > pre.code-content > code.language-julia > span.repl-prompt
julia> div.code-showcase > pre.code-content > code.language-julia > span.repl-prompt
julia> div.code-showcase > pre.code-content > code.language-julia > span.repl-prompt
julia> div.code-showcase > pre.code-content > code.language-julia > span.repl-prompt

These are opportunities to improve the legibility of your content.

Navigation

Properly ordered headings that do not skip levels convey the semantic structure of the page, making it easier to navigate and understand when using assistive technologies. Learn more about heading order.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Fast div.container > div.row > div.col-lg-4 > h3

These are opportunities to improve keyboard navigation in your application.

Best practices

Touch targets with sufficient size and spacing help users who may have difficulty targeting small controls to activate the targets. Learn more about touch targets.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Go to slide 1 body > div.container > div.carousel-dots > button.carousel-dot
Go to slide 2 body > div.container > div.carousel-dots > button.carousel-dot
Go to slide 3 body > div.container > div.carousel-dots > button.carousel-dot
Go to slide 4 body > div.container > div.carousel-dots > button.carousel-dot
Go to slide 5 body > div.container > div.carousel-dots > button.carousel-dot
Go to slide 6 body > div.container > div.carousel-dots > button.carousel-dot
Go to slide 7 body > div.container > div.carousel-dots > button.carousel-dot
Go to slide 8 body > div.container > div.carousel-dots > button.carousel-dot
Go to slide 9 body > div.container > div.carousel-dots > button.carousel-dot
Go to slide 10 body > div.container > div.carousel-dots > button.carousel-dot
Go to slide 11 body > div.container > div.carousel-dots > button.carousel-dot
Go to slide 12 body > div.container > div.carousel-dots > button.carousel-dot
Go to slide 13 body > div.container > div.carousel-dots > button.carousel-dot
Governance div.row > ul > li > a
Publications div.row > ul > li > a
Stewards div.row > ul > li > a
Diversity div.row > ul > li > a
JuliaCon div.row > ul > li > a

One main landmark helps screen reader users navigate a web page. Learn more about landmarks.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
html html

These items highlight common accessibility best practices.

○Interactive controls are keyboard focusable
○Interactive elements indicate their purpose and state
○The page has a logical tab order
○Visual order on the page follows DOM order
○User focus is not accidentally trapped in a region
○The user's focus is directed to new content added to the page
○HTML5 landmark elements are used to improve navigation
○Offscreen content is hidden from assistive technology
○Custom controls have associated labels
○Custom controls have ARIA roles
●`[aria-*]` attributes match their roles
●`[aria-hidden="true"]` is not present on the document `<body>`
●`[role]`s have all required `[aria-*]` attributes
●`[role]` values are valid
●`[aria-*]` attributes have valid values
●`[aria-*]` attributes are valid and not misspelled
●Buttons have an accessible name
●Image elements have `[alt]` attributes
●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
●ARIA attributes are used as specified for the element's role
●`[aria-hidden="true"]` elements do not contain focusable descendents
●Elements use only permitted ARIA attributes
●Document has a `<title>` element
●`<frame>` or `<iframe>` elements have a title
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●Links are distinguishable without relying on color.
●Links have a discernible name
●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
●Deprecated ARIA roles were not used
●Identical links have the same purpose.
●Elements with visible text labels have matching accessible names.
○`[accesskey]` values are unique
○`button`, `link`, and `menuitem` elements have accessible names
○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
○ARIA input fields have accessible names
○ARIA `meter` elements have accessible names
○ARIA `progressbar` elements have accessible names
○Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
○`[role]`s are contained by their required parent element
○Elements with the `role=text` attribute do not have focusable descendents.
○ARIA toggle fields have accessible names
○ARIA `tooltip` elements have accessible names
○ARIA `treeitem` elements have accessible names
○The page contains a heading, skip link, or landmark region
○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
○Definition list items are wrapped in `<dl>` elements
○ARIA IDs are unique
○No form fields have multiple labels
○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
○Input buttons have discernible text.
○`<input type="image">` elements have `[alt]` text
○Form elements have associated labels
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Select elements have associated label elements.
○Skip links are focusable.
○No element has a `[tabindex]` value greater than 0
○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
○`[lang]` attributes have a valid value
○`<video>` elements contain a `<track>` element with `[kind="captions"]`
○Tables have different content in the summary attribute and `<caption>`.
○All heading elements contain content.
○Uses ARIA roles only on compatible elements
○Image elements do not have `[alt]` attributes that are redundant text.
○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.
○`<td>` elements in a large `<table>` have one or more table headers.
A
Heading Hierarchy
29 headings, 1 skip(s)
PASS
29 headings, 1 skip(s)
Info::
Single H1 present
Warning::
Heading level skipped: H1 → H3 (missing H2)
Skipping heading levels breaks the document outline. Screen readers may interpret missing levels as structural errors.
  • H1 The Julia Programming Language
  • H3 Fast skipped
  • H3 Dynamic
  • H3 Reproducible
  • H3 Composable
  • H3 General
  • H3 Open source
  • H2 Ecosystem
  • H3 General Computing
  • H4 Build, Deploy or Embed Your Code
  • H3 Parallel Computing
  • H4 Parallel and Heterogeneous Computing
  • H3 Machine Learning
  • H4 Scalable Machine Learning
  • H3 Scientific Computing
  • H4 Rich Ecosystem for Scientific Computing
  • H3 Data Science
  • H4 Interact with your Data
  • H3 Visualization
  • H4 Data Visualization and Plotting
  • H2 JuliaCon 2025
  • H2 Packages
  • H2 Recent Blog Posts
  • H3 This Month in Julia World (February 2026)
  • H3 This Month in Julia World (January 2026)
  • H3 This Month in Julia World (December 2025)
  • H2 Talk to us
  • H2 Editors and IDEs
  • H2 Essential Tools

Skipping heading levels breaks the document outline. Screen readers may interpret missing levels as structural errors.

Why this matters

Skipping heading levels breaks the document outline — screen-reader users lose track of section nesting.

Learn more ▾

Screen reader users navigate by jumping between headings (H1 → H2 → H3). Skipping (H1 → H3) breaks the sense of hierarchy. Use sequential levels even if you don't like the default styling — restyle with CSS instead. WCAG 1.3.1 (Info and Relationships) treats this as an A failure.

Source: WCAG 2.1 SC 1.3.1 / W3C WAI

A+
Alt Text Quality
All 29 images OK
PASS
All 29 images OK
Info::
2 decorative image(s) correctly marked
Info::
27 image(s) with good alt text
29 images 27 good alt text 2 decorative
All images have appropriate alt text.
A+
Form Accessibility
No form controls
PASS
No form controls
Info::
No form controls on this page
No form controls found.
A+
Color Contrast (Screenshot)
20 text elements analyzed, 0 fail WCAG AA
PASS

Analyzes text contrast against the actual rendered page, including background images, gradients, and overlays that CSS-based tools cannot detect.

20 pass
Show all checked elements (20)
ElementRatioRequiredFGBGResult
h1 The Julia Programmin…21.00:13.0:1
#000000
#FFFFFF
Pass
h2 Ecosystem21.00:13.0:1
#000000
#FFFFFF
Pass
h2 JuliaCon 202521.00:13.0:1
#000000
#FFFFFF
Pass
h2 Talk to us21.00:13.0:1
#000000
#FFFFFF
Pass
h3 Fast21.00:13.0:1
#000000
#FFFFFF
Pass
h3 Dynamic21.00:13.0:1
#000000
#FFFFFF
Pass
h3 Reproducible21.00:13.0:1
#000000
#FFFFFF
Pass
h3 Composable21.00:13.0:1
#000000
#FFFFFF
Pass
h3 General21.00:13.0:1
#000000
#FFFFFF
Pass
h3 Open source21.00:13.0:1
#000000
#FFFFFF
Pass
h3 General Computing21.00:13.0:1
#000000
#FFFFFF
Pass
h3 Parallel Computing21.00:13.0:1
#000000
#FFFFFF
Pass
h3 Machine Learning21.00:13.0:1
#000000
#FFFFFF
Pass
h3 Scientific Computing21.00:13.0:1
#000000
#FFFFFF
Pass
h3 Data Science21.00:13.0:1
#000000
#FFFFFF
Pass
h3 Visualization21.00:13.0:1
#000000
#FFFFFF
Pass
h3 This Month in Julia …21.00:13.0:1
#000000
#FFFFFF
Pass
h3 This Month in Julia …21.00:13.0:1
#000000
#FFFFFF
Pass
h3 This Month in Julia …21.00:13.0:1
#000000
#FFFFFF
Pass
title The Julia Programmin…10.12:14.5:1
#000000
#ADB5BD
Pass

Methodology: The top 20 text elements by font size were checked. Background color was sampled from the desktop screenshot using a 5-point pattern. WCAG 2.1 AA requires 4.5:1 for normal text and 3:1 for large text.

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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