Re: correct character for (contrast) ratio

Hi Wolfgang,

We tested this proposal and checked with several screenreader users, you can see the thread:

The recommendation was not to make this change, for the reasons outlined in this comment:

It is an area that needs improvement though and there is a "Pronunciation Gap Analysis and Use Cases<>" doc from the W3C. This might be a good use-case to mention.

If you wish to pursue it, I suggest raising an issue (i.e. this use-case) for that document:

Kind regards,


AGWG co-chair

From: <>
Date: Thursday, 30 April 2020 at 10:22
To: <>
Subject: correct character for (contrast) ratio

Please use the correct character code for ratio (e.g. 3กร1 and not 3:1)!

WCAG 2.1 and the working draft for WCAG 2.2 use : but it should be กร (&ratio; or &#8758;).
Visually both look nearly the same, but good screen readers announce them differently.

Wolfgang Berndorfer

Received on Friday, 4 March 2022 17:37:41 UTC