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https://rki.de

Accessibility

· 13 checks — Landmarks, headings, alt text, forms, and link quality rolled into one auditable list.
SCORE
74
GRADE
C
FIX
2
REVIEW
5
PASS
6
INFO
0
Checks
13
6 PASS 5 REVIEW 2 FIX
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
Navigation UX
Action
1 navigation pattern(s)
FIX
1 navigation pattern(s)
Info::
Search functionality detected
Got: role-search
Info::
4 navigation landmark(s) detected
Info::
Hamburger menu detected (responsive design)
Breadcrumbs
Search role='search' landmark
Skip Link
Labeled Navigation 4 <nav> element(s)
Back to Top
Hamburger Menu
Sticky Navigation Cannot reliably detect (CSS-based)
3 of 6 testable patterns navigation patterns detected. Strong navigation UX with multiple discovery paths.
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
404 Page Quality ✓ Custom 404 Page
Status Code HTTP 404 ✓Page Title RKI - Homepage - ✓Custom Styling ✓Navigation ✓Homepage Link ✗Search Form ✗
C
Favicon & Branding
Action
14 icon(s) detected
REVIEW
14 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::
Apple touch icon present
Info::
Multiple icon sizes detected
✗ favicon.ico Missing
✓ PNG Icons Present
✓ Apple Touch Present
✗ SVG Favicon Missing
✗ Manifest Icons Missing
✓ Multiple Sizes Present
B
Dark Mode Support
Dark mode detected
REVIEW
Dark mode detected
Info::
color-scheme meta tag present
The site declares support for light and dark color schemes via <meta name='color-scheme'>.
Got: dark light
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: #ffffff
Info::
Detection limited to meta tags and inline styles
External CSS files may contain prefers-color-scheme rules not visible to this scan.
Dark Mode✓ Dark Mode Supported
color-scheme meta dark light ✓Dark theme-color Not set ✗CSS indicators Not detected ✗

Detection limited to meta tags and inline styles.

C
Color Contrast (Screenshot)
Action
20 text elements analyzed, 20 fail WCAG AA
REVIEW

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

0 pass 20 fail WCAG AA
h1 Navigation und Service
1.51:1
#000000
on
#272D32
needs 3.0:1 (large text)
32px · top of page (header area) · over background image/gradient
h1 Internetauftritt des Robert Koch-Institu…
1.28:1
#000000
on
#1C2023
needs 3.0:1 (large text)
32px · bottom of viewport
h1 Seiteninformationen und -Funktionen
1.28:1
#000000
on
#1C2023
needs 3.0:1 (large text)
32px · bottom of viewport
h1 Bildnachweis
1.28:1
#000000
on
#1C2023
needs 3.0:1 (large text)
32px · bottom of viewport
h2 Servicemenü
1.17:1
#000000
on
#071826
needs 3.0:1 (large text)
24px · above the fold
h2 - Gesundheit für alle
1.28:1
#000000
on
#1C2023
needs 3.0:1 (large text)
24px · bottom of viewport
h2 Meldungen
1.28:1
#000000
on
#1C2023
needs 3.0:1 (large text)
24px · bottom of viewport
h2 Themeneinstieg
1.28:1
#000000
on
#1C2023
needs 3.0:1 (large text)
24px · bottom of viewport
h2 Veröffentlichungen
1.28:1
#000000
on
#1C2023
needs 3.0:1 (large text)
24px · bottom of viewport
h2 Termine
1.28:1
#000000
on
#1C2023
needs 3.0:1 (large text)
24px · bottom of viewport
h2 Laufende Studien
1.28:1
#000000
on
#1C2023
needs 3.0:1 (large text)
24px · bottom of viewport
h2 RKI-Erklärfilm
1.28:1
#000000
on
#1C2023
needs 3.0:1 (large text)
24px · bottom of viewport
h2 Das Robert Koch-Institut
1.28:1
#000000
on
#1C2023
needs 3.0:1 (large text)
24px · bottom of viewport
h3 Impfver­halten ver­stehen,
1.28:1
#000000
on
#1C2023
needs 3.0:1 (large text)
19px · bottom of viewport
h3 steigern
1.28:1
#000000
on
#1C2023
needs 3.0:1 (large text)
19px · bottom of viewport
h3 Europäische Impf­woche 2026 der
1.28:1
#000000
on
#1C2023
needs 3.0:1 (large text)
19px · bottom of viewport
h3 -Region Europa unter dem Motto: „Impfu…
1.28:1
#000000
on
#1C2023
needs 3.0:1 (large text)
19px · bottom of viewport
h3 Sexuelle und reproduktive Gesundheit als…
1.28:1
#000000
on
#1C2023
needs 3.0:1 (large text)
19px · bottom of viewport
h3 Hygiene­management bei Verdacht auf Kra…
1.28:1
#000000
on
#1C2023
needs 3.0:1 (large text)
19px · bottom of viewport
h3 Infektions­epidemio­lo­gisches Jahrbu…
1.28:1
#000000
on
#1C2023
needs 3.0:1 (large text)
19px · bottom of viewport

1 contrast failures on background images/gradients

These failures are invisible to CSS-based accessibility tools like Lighthouse. The text may be fine on a solid background, but fails when rendered over an image or gradient.

Show all checked elements (20)
ElementRatioRequiredFGBGResult
h1 Navigation und Servi…1.51:13.0:1
#000000
#272D32
Fail
h1 Internetauftritt des…1.28:13.0:1
#000000
#1C2023
Fail
h1 Seiteninformationen …1.28:13.0:1
#000000
#1C2023
Fail
h1 Bildnachweis1.28:13.0:1
#000000
#1C2023
Fail
h2 Servicemenü1.17:13.0:1
#000000
#071826
Fail
h2 - Gesundheit für al…1.28:13.0:1
#000000
#1C2023
Fail
h2 Meldungen1.28:13.0:1
#000000
#1C2023
Fail
h2 Themeneinstieg1.28:13.0:1
#000000
#1C2023
Fail
h2 Veröffentlichungen1.28:13.0:1
#000000
#1C2023
Fail
h2 Termine1.28:13.0:1
#000000
#1C2023
Fail
h2 Laufende Studien1.28:13.0:1
#000000
#1C2023
Fail
h2 RKI-Erklärfilm1.28:13.0:1
#000000
#1C2023
Fail
h2 Das Robert Koch-Inst…1.28:13.0:1
#000000
#1C2023
Fail
h3 Impfver­halten ver…1.28:13.0:1
#000000
#1C2023
Fail
h3 steigern1.28:13.0:1
#000000
#1C2023
Fail
h3 Europäische Impf­w…1.28:13.0:1
#000000
#1C2023
Fail
h3 -Region Europa unter…1.28:13.0:1
#000000
#1C2023
Fail
h3 Sexuelle und reprodu…1.28:13.0:1
#000000
#1C2023
Fail
h3 Hygiene­management …1.28:13.0:1
#000000
#1C2023
Fail
h3 Infektions­epidemio…1.28:13.0:1
#000000
#1C2023
Fail

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.

A
Landmark Structure
16 landmarks
PASS
16 landmarks
Info::
<main> landmark present
Info::
4 <nav> landmark(s) found
Info::
All <nav> elements are properly labeled
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.
Info::
Search landmark present
Page Structure — as a screen reader sees it
BANNER header NAV "navskiphead" SEARCH MAIN CONTENTINFO footer

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

A
Heading Hierarchy
28 headings
PASS
28 headings
Warning::
Multiple H1 headings (4 found)
A page should have only one H1. Multiple H1s dilute the document outline.
Info::
2 hidden heading(s) (aria-hidden)
  • H1 Navigation und Service
  • H2 Servicemenü hidden
  • H1 Internetauftritt des Robert Koch-Instituts duplicate H1
  • H2 Public Health - Gesundheit für alle
  • H3 Impfver­halten ver­stehen, Prepared­ness steigern
  • H2 Meldungen
  • H3 Europäische Impf­woche 2026 der WHO-Region Europa unter dem Motto: „Impfungen wirken in jeder Generation“
  • H3 Sexuelle und reproduktive Gesundheit als Leitthema im Bundesgesundheitsblatt
  • H3 Hygiene­management bei Verdacht auf Krank­heiten durch hoch­pathogene Erreger außer­halb einer Sonder­isolier­station: Hand­buch EKOS-Net Praxis­bericht
  • H3 Infektions­epidemio­lo­gisches Jahrbuch 2024 erschienen
  • H3 RKI 2035 – eine gesündere Zu­kunft für alle
  • H2 Themeneinstieg
  • H2 Veröffentlichungen
  • H3 RKI-Ratgeber Tularämie | Untersuchung zum Salmonella Bochum-Ausbruch 2025/26
  • H3 Die allgemeine Gesundheitskompetenz Erwachsener in Deutschland. Ergebnisse des Panels „Gesundheit in Deutschland“ 2024
  • H2 Zahl des Monats : 0
  • H2 Termine
  • H3 23. April 2026 bis 23. April 2026 Wie For­schung Wissen schafft – Das RKI erleben, Gesund­heit verstehen: Schulklassen im RKI
  • H3 28. April 2026 bis 28. April 2026 Wie For­schung Wissen schafft – Das RKI erleben, Gesund­heit verstehen: Schul­klassen im RKI
  • H3 08. Juni 2026 bis 09. Juni 2026 Robert Koch Colloquium 2026 "Navigating Public Health in Times of Global Uncertainties"
  • H2 Laufende Studien
  • H3 Nationale Krank­heits­last­studie (Burden 2025)
  • H3 West-Nil-Virus-Fall-Kontroll­studie
  • H3 Panel "Gesundheit in Deutschland"
  • H2 RKI-Erklärfilm
  • H2 Das Robert Koch-Institut
  • H1 Seiteninformationen und -Funktionen duplicate H1
  • H1 Bildnachweis hidden

A page should have only one H1. Multiple H1s dilute the document outline.

Why this matters

Multiple H1s blur the page's primary topic — screen-reader users and Google both prefer one H1.

Learn more ▾

HTML5's outline algorithm technically allows multiple H1s within sectioning content, but no browser implements it. In practice: one H1 per page. Use H2-H6 for subsections.

Source: WCAG 2.4.6 / Google Search Central

A+
Alt Text Quality
All 8 images OK
PASS
All 8 images OK
Info::
2 decorative image(s) correctly marked
Info::
6 image(s) with good alt text
8 images 6 good alt text 2 decorative
All images have appropriate alt text.
A+
Form Accessibility
All 2 controls labeled
PASS
All 2 controls labeled
Info::
2 control(s) properly labeled
2 controls
2 labeled
0 placeholder only
0 unlabeled
ControlTypeLabelMethod
#f16777188d16880010searchSuchbegriff eingebenfor/id
#f16777188d16880010searchSuchbegriff eingebenfor/id
A+
Print Stylesheet
Print styles detected
PASS
Print styles detected
Info::
External print stylesheet detected
Got: https://www.rki.de/SiteGlobals/Frontend/Styles/addon_print.css?v=5
Print Stylesheet ✓ Print Optimized
Print stylesheet https://www.rki.de/SiteGlobals/Frontend/Styles/addon_print.css?v=5 ✓Inline @media print Not detected ✗
A+
Lighthouse Accessibility Audits
Score 100/100 — 0 failing, 26 passed
PASS
100

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.

○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
●Form elements have associated labels
●`[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
●Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
●`[aria-hidden="true"]` elements do not contain focusable descendents
●Elements use only permitted ARIA attributes
●Background and foreground colors have a sufficient contrast ratio
●Document has a `<title>` element
●`<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
●No element has a `[tabindex]` value greater than 0
●Touch targets have sufficient size and spacing.
●Heading elements appear in a sequentially-descending order
●Document has a main landmark.
●Deprecated ARIA roles were not used
●ARIA IDs are unique
●Uses ARIA roles only on compatible elements
○`[accesskey]` values are unique
○`button`, `link`, and `menuitem` elements 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
○No form fields have multiple labels
○`<frame>` or `<iframe>` elements have a title
○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
○Image elements have `[alt]` attributes
○Input buttons have discernible text.
○`<input type="image">` elements have `[alt]` text
○Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
○List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Select elements have associated label elements.
○Skip links are focusable.
○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.
○Image elements do not have `[alt]` attributes that are redundant text.
○Identical links have the same purpose.
○Elements with visible text labels have matching accessible names.
○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.
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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