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Re: Color contrast principle

From: Laura Carlson <laura.lee.carlson@gmail.com>
Date: Thu, 17 Jan 2019 07:29:45 -0600
Message-ID: <CAOavpvfSLeaj5magH4yGUb2vpMgiN_b0j8GzgphGMugTyNAm0A@mail.gmail.com>
To: Alastair Campbell <acampbell@nomensa.com>
Cc: "WCAG list (w3c-wai-gl@w3.org)" <w3c-wai-gl@w3.org>
+1 on this latest version.

On 1/17/19, Alastair Campbell <acampbell@nomensa.com> wrote:

> that would make it:
> If components use several colors, any color which does not interfere with
> identifying the component can be ignored for the purpose of measuring
> contrast ratio. For example, a 3D drop-shadow on an input, or a dark border
> line between contrasting [backgrounds is considered to be subsumed into the
> color closest in brightness (luminance)].
> The following example shows an input that has a light background on the
> inside and a dark background around it. The input also has a dark grey
> border which [is considered to be subsumed] into the dark background. The
> border does not interfere with identifying the component, so the contrast
> ratio is taken between the white background and dark blue background.

Kindest Regards,


Laura L. Carlson
Received on Thursday, 17 January 2019 13:30:11 UTC

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