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Re: Color Contrast - where to measure?

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From: tim.harshbarger
Date: Aug 16, 2023 7:43AM

Someone else might be able to explain this better.



My understanding is that using the coded RGB values is more accurate than
using the eye dropper.



The reason for this is that sometimes the colors you see on the screen are
created by combining pixels of various other colors. What the human eye
perceives is the color of the combined pixels as a whole and not the
individual pixel colors. The problem with the eye dropper is that it might
only be sampling some of those individual pixels and thus is not reporting
back the true color that is perceived by the human eye.



AT least that is my understanding. Hopefully someone else might be able to
shed more light on this topic.



Thanks!

Tim

From: WebAIM-Forum < <EMAIL REMOVED> > On Behalf Of Kevin
Prince
Sent: Tuesday, August 15, 2023 4:45 PM
To: WebAIM Discussion List < <EMAIL REMOVED> >
Subject: Re: [WebAIM] Color Contrast - where to measure?



Exactly my understanding too. You can advise that the colours chosen are
sufficient but, due to smoothing etc the apparent effect makes it hard to
read so a heavier/darker/different font treatment would help provide better
accessibility and usability but not fail WCAG.

Kevin


Kevin Prince


Product Accessibility & Usability Consultant





Foster Moore


A Teranet Company






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Christchurch


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