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Quick answers
When should I pick Accessible viz?
When the story is: public dashboards, exams, print in grey, legal slides.
When should I avoid Accessible viz?
Skip it in cases like: relying on red/green alone to mean bad/good.
Who invented or popularised it?
Ishihara plates 1917; WCAG 2 contrast; Okabe–Ito palettes for deuteranopia
What does it encode?
redundant channels: position, pattern, label, not hue alone
Is it OK in ads?
Yes if one claim is visible at a glance in Meta, Google and retail print; otherwise link to a full figure.
Will a teacher accept it?
Yes for lab reports and poster boards if axes, units and a source line are present.
Accessible viz encodes values as redundant channels: position, pattern, label, not hue alone. Ishihara plates 1917; WCAG 2 contrast; Okabe–Ito palettes for deuteranopia.
In reports, ads and assignments it fits public dashboards, exams, print in grey, legal slides. Skip it when relying on red/green alone to mean bad/good.
Use when
- Use when 1 — Use Accessible viz when the story is public dashboards, exams, print in grey, legal slides.
- Use when 2 — Build the first draft in Excel or Google Sheets, then restyle — do not screenshot.
- Use when 3 — In PowerPoint, one Accessible viz per slide, claim in the title.
- Use when 4 — For lab reports and poster boards, this form works when the question is comparison or process.
- Use when 5 — In Meta, Google and retail print, keep one number visible at thumbnail size.
Avoid when
- Avoid when 1 — Skip Accessible viz in cases like: relying on red/green alone to mean bad/good.
- Avoid when 2 — 3-D, dual axes, rainbow scales
- Avoid when 3 — Undated numbers, undated time series
- Avoid when 4 — Four charts on one slide
Audiences
- Work — PowerPoint
- Ads — Meta, Google and retail print
- School — lab reports and poster boards
Accessible viz: honour redundant channels: position, pattern, label, not hue alone, and switch when relying on red/green alone to mean bad/good.