Additional Discussions Regarding Contrast (Silver, LVTF, APCA)

[Myndex]

Additional Contrast Threads and Discussions

There are additional threads in Silver that may be useful to move over, or if not, this post can provide a directory of sorts. The below still may contain useful information, including review and academic discussion, and answers to questions from the community.

Positive peer comments

w3c/silver#412 Comment on APCA by Vicent Sanchis Jurado, PhD in Optometry and Vision Sciences

#297 Chris Lilly, W3C Technical director, approving the June 2022 pull request of APCA (stable version)

Contrast related discussions with the community

w3c/silver#72 proposal of @access query

w3c/silver#223 binary vs range conformance

w3c/silver#227 Do No Harm, discussion of contrast etc.

w3c/silver#261 dark mode

w3c/silver#266 licensing

w3c/silver#268 failures compared to WCAG2

w3c/silver#271 white space

w3c/silver#285 anti-aliasing of text

w3c/silver#302 different languages/fonts

w3c/silver#343 px as canonical unit

w3c/silver#370 Deque re efficacy

w3c/silver#382 Deque re early conformance models

Discussions with Dr. Waller

These are the Silver threads which were part of Dr. Waller's 2021 review of APCA.
Some discussions may be incomplete as some discussions continued in the LVTF or in direct emails.
Some may be obsolete as addressed with later revisions.

w3c/silver#332 regarding terminology

w3c/silver#333 CVD and protan compensation

w3c/silver#335 Lc, terminology, luminance, perceptual contrast

w3c/silver#334 testability and metrics vs test subjects
Note: 338, 339 are obsolete, referring to the old 5 level scoring

w3c/silver#337 tools and font types

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Additional discussions (not to be moved) from LVTF and APCA

Low Vision Task Force

• LVTF Discussions https://github.com/w3c/low-vision-a11y-tf/discussions
  • Dr. Waller's article on Contrast Algorithms Sam's article comparing contrast algorithms low-vision-a11y-tf#155
  • body text and display distance Body Text Fluent Readability low-vision-a11y-tf#129
  • accessible font design Font Design and Accessibility low-vision-a11y-tf#116

APCA Discussions and Drafts

• Draft White Papers @ APCA Discussions

  • Contrast Arising from Text Spatial Frequency Myndex/SAPC-APCA#90
  • A Discussion of Inline Links (Theory and Practice) Myndex/SAPC-APCA#65
  • Defining Requirements for a Complete Visual Contrast Guideline Myndex/SAPC-APCA#103
  • Photicseizures and limits Myndex/SAPC-APCA#105
  • Glossary: Terminology Emerging From APCA Research Myndex/SAPC-APCA#104
  • APCA Use Cases and Conformance Research Myndex/SAPC-APCA#39
  • APCA in WCAG 2-style SCs APCA Alternate SC for WCAG 2.3 Proposal Myndex/SAPC-APCA#31
  • Contrast is about Size not Color Contrast is about Size not Color Myndex/SAPC-APCA#71

• APCA Discussions https://github.com/Myndex/SAPC-APCA

  • list of user needs threads List of early threads on theory or user needs Myndex/SAPC-APCA#112

• Q&A and Discussions

  • WCAG 2 vs APCA (Extended) WCAG 2 vs APCA Comparisons Myndex/SAPC-APCA#30
  • Fonts & APCA reference alignment Myndex/SAPC-APCA#28
  • Additional comparisons From LVTF: WCAG/APCA compare Myndex/SAPC-APCA#55
  • Lc Value vs Simple Ratio •• AND •• Bridge-PCA Myndex/SAPC-APCA#42
  • Support for wide gamut contrast Myndex/SAPC-APCA#98
  • Discuss Maximum Contrast Here Myndex/SAPC-APCA#106
  • HDR Displays, Dark Mode Color Palettes, and APCA Myndex/SAPC-APCA#74
  • High and low contrast modes Guidelines for reduced/increased contrast modes? Myndex/SAPC-APCA#82