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Re: Color Contrast Testing Visual Question


From: Maxability
Date: Aug 23, 2019 9:39AM

Hey Jim,

Color contrast is purely luminosity ratio between two color codes. These
color codes come from the CSS developers / designers define. Ideally the
test is performed on standard settings.

I have not tested or guided to test color contrast on mobile but we used
to take the screenshot of the mobile screen and open it on desktop for
color contrast, still the contrast ratios used to be accurate.

Thanks & Regards


On 8/23/2019 9:00 PM, Steve Green wrote:
> The tester's comments do not appear to make sense. Apart from monochrome monitors, it is almost impossible to buy a monitor that doesn't support 24-bit colour, so the displayed colours will always correspond accurately to the hex codes that have been specified.
> It is possible that they are referring to the screen resolution rather than the colour depth, in which case they may have just written up the issue badly. Perhaps there are different colour combinations at different screen widths, depending on how the responsive design has been implemented.
> Steve Green
> Managing Director
> Test Partners Ltd
> -----Original Message-----
> From: WebAIM-Forum < <EMAIL REMOVED> > On Behalf Of Jim Homme
> Sent: 23 August 2019 16:18
> To: WebAIM Discussion List < <EMAIL REMOVED> >
> Subject: [WebAIM] Color Contrast Testing Visual Question
> Hi,
> This is a question for my understanding as a totally blind person. A tester reports that content passes or fails contrast testing depending on monitor settings. We are using Colour Contrast Analyzer. If this is the case, how can we depend on accurate results, because we would not know the kind of monitor an audience has?
> Thanks.
> Jim
> ==========
> Jim Homme
> Digital Accessibility
> Bender Consulting Services
> 412-787-8567
> https://www.benderconsult.com/our%20services/hightest-accessible-technology-solutions
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