Beschäftigte

Service

Aktuelle Ereignisse und Veranstaltungen an der Uni Köln

Verwaltung

Veranstaltungen Uni Köln: Tagungen, Kolloquien, Vorträge

Studium und Lehre an der Uni Köln

Organisation

Rektorat

Anreise, Lagepläne, Kontakt

Forschung im Überblick

All interactive components on a page, such as buttons or menus, should be far enough apart 
from other interactive areas, to avoid them being used by mistake. 

This ensures people with motor impairments can easily click or tap on the right element.

## How to fix

* Ensure all interactive elements are at least 24 CSS pixels wide and tall
* OR ensure there is at least 24 CSS pixels (minus the width and height of the element)
  between each interactive element

## Methodology

This check is run on both the mobile and desktop versions of every page. Results
for each may differ.

1. All interactive elements are identified, including buttons, links, and form controls.
2. If an element is not normally visible, it is ignored. This includes elements which
   are positioned offscreen or cropped (e.g. for 'screen-reader only' text).
3. If an element is larger than 24 CSS pixels in both dimensions, it passes.
4. Otherwise, the element is compared to all other elements on the page.
5. The minimum horizontal gap between the element is calculated as 24 CSS pixels,  
   minus the width of the element.
6. The minimum vertical gap between the element is calculated as 24 CSS pixels,  
   minus the height of the element.
7. If another element falls within the minimum horizontal or vertical gap, the 
   element fails, unless both are links that point to the same place.

## Further reading

* [Target Size (Minimum)](https://www.w3.org/WAI/WCAG22/Understanding/target-size-minimum.html)
* [Technique C42 - Using min-height and min-width to ensure sufficient target spacing](https://www.w3.org/WAI/WCAG22/Techniques/css/C42)

ensure-minimum-target-size

January 2026

December 2025

University of Cologne

Title / URL	Issues
Beschäftigtewww.uni-koeln.de/universitaet/beschaeftigte	29
Servicewww.uni-koeln.de/universitaet/einrichtungen/service	26
Aktuelle Ereignisse und Veranstaltungen an der Uni Kölnwww.uni-koeln.de/universitaet/aktuell	23
Verwaltungwww.uni-koeln.de/universitaet/einrichtungen/verwaltung	21
Veranstaltungen Uni Köln: Tagungen, Kolloquien, Vorträgewww.uni-koeln.de/universitaet/aktuell/veranstaltungen	20
Studium und Lehre an der Uni Kölnwww.uni-koeln.de/studium-lehre	17
Organisationwww.uni-koeln.de/universitaet/beschaeftigte/organisation	17
Rektoratwww.uni-koeln.de/universitaet/organisation/rektorat	16
Anreise, Lagepläne, Kontaktwww.uni-koeln.de/universitaet/anreise-lageplaene-kontakt	16
Forschung im Überblickwww.uni-koeln.de/forschung/forschung-im-ueberblick	12

Ensure interactive components are far enough apart

University of Cologne

Where this issue has occurred