W3C home > Mailing lists > Public > w3c-wai-gl@w3.org > October to December 2016

RE: Issue 9: Informational Graphic Contrast (Minimum)

From: Kathy Wahlbin <kathy@interactiveaccessibility.com>
Date: Mon, 21 Nov 2016 14:22:13 +0000
To: Alastair Campbell <acampbell@nomensa.com>, WCAG <w3c-wai-gl@w3.org>
Message-ID: <AA2ADA4972B28E44BEA975C2E84D405946809B66@ORD2MBX02G.mex05.mlsrvr.com>
Thanks Alastair –

So are you proposing that all colors within the graphic need to meet the 4.5:1 color contrast ratio unless they meet the requirements to have a 3:1 color contrast?

CEO & Founder
Interactive Accessibility

T (978) 443-0798  F (978) 560-1251  C (978) 760-0682
E kathyw@ia11y.com<mailto:kathyw@ia11y.com>

NOTICE: This communication may contain privileged or other confidential information. If you are not the intended recipient, please reply to the sender indicating that fact and delete the copy you received. Any disclosure, copying, distribution or action taken or omitted to be taken by an unintended recipient in reliance on this message is prohibited and may be unlawful.

From: Alastair Campbell [mailto:acampbell@nomensa.com]
Sent: Monday, November 21, 2016 9:17 AM
To: WCAG <w3c-wai-gl@w3.org>
Subject: Re: Issue 9: Informational Graphic Contrast (Minimum)


For anyone looking at the last agenda item (new SC survey), the second item (Issue 9) isn’t well formatted on github (yet).

There was a comment already about how to test multi-colored graphics, which I think is answered, but is easily missed on the current github description.

A better formatted version is here in the meantime:


The short answer is that: Any ‘graphical element’ needed for understanding has to be discernible from its surroundings, whether that is background or adjacent elements. There are many ways of doing that, whether it is removing the need for it to be understood (e.g. adding a label), or borders, or patterns.

There is a set of examples with workings here:


Kind regards,

Received on Monday, 21 November 2016 14:22:45 UTC

This archive was generated by hypermail 2.4.0 : Thursday, 24 March 2022 21:08:07 UTC