Patrick H. LaukeJul 4, 2024
a small heads-up / public service announcement: if you're using Google Chrome (possibly just on Windows?), don't rely on using colour pickers (even Chrome's own built-in picker in Developer Tools) to check colours (for things like contrast ratio), as you won't get correct values (even taking screenshots and using a separate graphics app) https://www.youtube.com/watch?v=maLubMYfKxM #a11y #accessibility
Don't rely on colour pickers in Chrome/Windows

YouTube
Show threadKilian ValkhofJul 4, 2024

@patrick_h_lauke This almost certainly is caused by the (color profile of the) monitor you're using.

I can't replicate it on my (stock) windows machine with Chrome's eyedropper running in Polypane.

Show threadPatrick H. LaukeJul 4, 2024
@Kilian yes, but that's my point. don't rely on colour-picking the output, as it's colour managed
Show threadInclusive Reading Technologies

@patrick_h_lauke @Kilian

Indeed: If color management is enabled (on any system, Win/Mac/Lix) the dropper may provide unpredictable results. Choosing a default sRGB profile while using the picker may help mitigate issues.

Better to use a stand alone dropper tool that is color management aware.

For MacOS, that's "Classic Color Meter" desktop app.

Discussion and best practices in our draft guidelines:

https://readtech.org/ARC/tests/visual-readability-contrast/?tn=methods#tool-setup

#contrast #color #colour

APCA Readability Criterion • Contrast

The APCA Readability Criterion (ARC) provide a range of recommendations for making visual content on illuminated displays more accessible to all users, especially with visual impairments

Inclusive Reading Technologies
Jul 8, 2024 at 12:22amWeb