For the "it's the law tho" crowd, here's a fix:

APCA to WCAG 2 Backwards Compatibility Chart

For 4.5:1

Backwards 4.5:1 is achieved when:

IF the lightest color is darker than #d0d0d0
OR the darkest is darker than #595959
THEN Lc ±60 exceeds 4.5:1

ELSE Lc 72 or Lc -77 exceeds 4.5:1 in all cases

---
For 3:1

Backwards 3:1 is achieved when:

IF the lightest color is darker than #c4c4c4
OR the darkest is darker than #6c6c6c
THEN Lc ±45 exceeds 3:1

ELSE Lc 57 or Lc -63 exceeds 3:1 in all cases

---
Here's the implication:

If both colors are darker than #d0d0d0 or at least one is darker than #595959:

Then it's not a matter of "can you?" use APCA, it's a matter of you *should* use APCA.

For color pairs darker than #d0d0d0, WCAG 2.x contrast math results are not meaningful, and create inaccessible, often unreadable, color pairs.

Actual Accessibility is where it's at.

#darkmode #Webdesign
#a11y #color #webdev
#colour #wcag #apca

Recent positive, independent peer review of APCA:

"...15 years since the adoption of WCAG 2.0...enhanced color models adapted to human perception, have been developed...APCA shows more accurate results for measuring color contrast..."

#a11y #Webdesign #accessibility #color #colour #contrast #APCA #WCAG

https://doi.org/10.1007/978-3-031-35992-7_53

Recent positive, independent peer review of APCA:

"...15 years since the adoption of WCAG 2.0...enhanced color models adapted to human perception, have been developed...APCA shows more accurate results for measuring color contrast..."

#a11y #Webdesign #accessibility #color #colour #contrast #APCA #WCAG

https://doi.org/10.1007/978-3-031-35992-7_53

ACTUAL accessibility is what is important!

https://blog.thms.uk/2023/05/colour-contrast-and-accessibility#colour-contrast-and-accessibility

"...don't just blindly follow the contrast rating or the Lighthouse metrics.....making the button text black would've given me the perfect score, but it would've led to a worse experience for actual humans..."

#a11y #AccessibleEU #accessibility4all #color #colour #contrast #wcag #Webdesign

Noch eine #BestPractice Frage hinterher, oder eher eine … Definitionsfrage? #Aufzählungszeichen: Sollten/Müssen die den Kontrastkriterien der #WCAG entsprechen? Sie sind ja nicht wirklich "Text", rein dekorativ sind sie aber auch nicht unbedingt, sie geben einem Textblock schon Struktur. So richtig essentiell sind sie aber auch nicht (stelle ich mir den Text ohne die Zeichen vor, geht kein Sinn verloren).

Auslegungssache?

#a11y #accessibility #Barrierefreiheit

LEGALLY READABLE (a thread)

APCA is not official per WCAG 3 yet, as WCAG3 is undergoing major changes, particularly to the conformance model.

However APCA is also an independent standard as part of the IRT-RC (Inclusive Reading Technologies Readability Criterion), this is useable per the public beta, and comments are encouraged.

In the majority of the world in most contexts, WCAG 2.x is not strict "law" and designers may use alternate standards. Including the USAB-508 under the "alternate facilitation" rule. (Regions or contracts vary so determine your requirements).

Considering the serious flaws in WCAG 2.x contrast, those who can should be encouraged to use standards that promote actual accessibility, such as APCA/IRT-RC.

(continued...)

#a11y #accessibility #color #colour #contrast #WCAG #APCA

Have you ever wanted to calculate the contrast ratio between two colors in #sass? I put together a couple of helper functions to assist with this. Check out my post here: https://jasong.us/3IIbxQE

#wcag #design #colors #color #accessibility #webdesign #axe #wai #w3c

During the first Candidate Review period several issues were raised that the Accessibility Guidelines Working Group (AG) felt needed to be addressed before publication. As a result, the AG made changes and has published an updated Candidate Recommendation (CR) of WCAG 2.2. Read more at https://whollyaccessible.org/2023/01/25/wcag-2-2-updated-candidate-recommendation/ #accessibility #wcag

RT @pauljadam@twitter.com

Take away the #WCAG 4.1.1 Parsing requirement from #WCAG22 and see a further decrease in code quality and readability as we further devolve into the mess of spaghetti code that is our "modern web". #a11y

🐦🔗: https://twitter.com/pauljadam/status/1598725090937634818

#Accessibility help needed: Can we synthesise #audio tracks (voiceovers) for videos to meet #WCAG requirements? And, if so, how? That is, can we create a descriptive transcript and set it so that it can be read aloud? Is it only a combo of #AblePlayer and #VTT that will make this work? #captions #subtitles #video

Beitrag "#WCAG or #PDF/UA: what’s the #difference"
Vortragender: Boris Doubrov, Dual Lab sprl

Never realised how brill #Mastadon would be for #Accessibilty information. Who can point me in the direction of a) An #accessible web media player - e.g. for managing transcripts, audio descriptions etc. and b) an easy to understand of #WCAG requirements for media on websites. The default guidance makes my head hurt! We currently use #YouTube but is there something better to publish our videos into when embedding on web pages?

Websites should be navigable by keyboard alone. Sometimes custom focus handling is necessary for #WCAG conformance, in this #blog post I provide a step-by-step tutorial on how to implement focus traps.

#webdev #a11y #frontend

https://www.tohuwabohu.io/2022/11/focus-traps/

RT @w3c_wai: On #GAAD learn what #W3C #WAI is up to in May 2022. Get news & upcoming publications. You can contribute -- be one of the "we". See:

--> What We're Working On
--> https://www.w3.org/WAI/update/

#a11y #accessibility #WCAG #ARIA #COGA #EPUB

🐦🔗: https://nitter.eu/EU_opendata/status/1527195438004293632

#Accessibility 3/10:
To ensure websites are accessible for people with disabilities, we need to respect certain #standards.
Discover more on our eLearning site for #AccessiblePublishing: https://europa.eu/!Gk49vN

Count down to #GAAD🎈 on 19 May! 🥁
#WCAG #InclusiveDesign

🐦🔗: https://nitter.eu/EULawDataPubs/status/1524800668015464448

Wußte gar nicht, dass man sich bei #NeuHier vorstellen soll. Habe ich damals, als es noch #BarCamps im RL gab, nicht gemacht; will ich aber gern nachholen:

Ich bin der Niko aus #Hannover, nur echt mit 'k'.
Ich mag #Netflix, #AmazonPrime und #DisneyPlus, während ich im #HomeOffice arbeite.
Die Entfernung zwischen mir und unserem Firmensitz beträg knapp eine Stunde Flugzeit oder etwa 5 Stunden Bahn-Zeit.

Ich arbeite als Produktmanager und erstelle barrierefreie PDF.
#WCAG #BITV #BGG

RT @w3c_wai@twitter.com

WCAG 2.2 Working Draft is now ready for your review. There are 9 new success criteria. (We might go from here to finalization steps.) Please comment by 18 Sept. See more info at: https://www.w3.org/blog/2020/08/wcag22-wide-review/ Thanks in advance for your input. #a11y #wcag

🐦🔗: https://twitter.com/w3c_wai/status/1293034805777637376

RT @TetraLogical@twitter.com

The latest Working Draft of @W3C@twitter.com #WCAG 2.2 is out for wide review. WCAG 2.2 proposes 9 new Success Criteria: https://www.w3.org/TR/WCAG22/

File issues and comments here: https://github.com/w3c/wcag/issues/new

🐦🔗: https://twitter.com/TetraLogical/status/1293084819069575168

Contrast is a nice little GNOME app that helps you pick a #WCAG compliant colour-pair:

https://gitlab.gnome.org/World/design/contrast

(via Fedora Magazine)