European Space Agency

ESA - Careers at ESA

ESA - Newsroom

ESA - Education

ESA - 50 years of ESA

First time visit: View without clicking anything

ESA - ESTEC

ESA - Corporate news

ESA - ESA Web TV

To comply with WCAG AA, the colour of text must sufficiently contrast with
its background color, so that people with moderate visual impairments can read it.

The [contrast ratio](https://www.w3.org/TR/UNDERSTANDING-WCAG20/visual-audio-contrast-contrast.html#contrast-ratiodef) 
must be at least 4.5:1 for body text, and 3:1 for large text.

A much more demanding version of this check (1.4.6) exists for WCAG AAA. Ignoring an issue in this check 
will also ignore it in that check, and vice versa.

aa-text-contrast

December 2025

November 2025

Title / URL	Issues
European Space Agencywww.esa.int/	100
ESA - Careers at ESAwww.esa.int/About_Us/Careers_at_ESA	100
ESA - Newsroomwww.esa.int/Newsroom	100
ESA - Educationwww.esa.int/Education	100
ESA - 50 years of ESAwww.esa.int/About_Us/50_years_of_ESA	100
First time visit: View without clicking anythingwww.esa.int/	100
ESA - ESTECwww.esa.int/About_Us/ESTEC	90
ESA - Corporate newswww.esa.int/About_Us/Corporate_news	53
ESA - ESA Web TVwww.esa.int/ESA_Multimedia/ESA_Web_TV	3

Ensure text has sufficient contrast (AA)

European Space Agency

Where this issue has occurred