General
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Tools: WebAIM Contrast Checker
browser DevTools
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General
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| Critical | Blocks access entirely | No keyboard focus
empty buttons
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General
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| Serious | Major barriers | Poor contrast
missing form labels
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General
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| Moderate | Difficult but usable | Inconsistent navigation
unclear error messages | Next release |
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General
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Accessibility Testing Superpower
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General
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- Best practice
not requirement
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General
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axe-core: 0 critical violations
0 serious violations
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General
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where L1 = lighter luminance
L2 = darker luminance
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General
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4. Test tables (T key
arrow keys within table)
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General
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5. Test forms (F key
complete form submission)
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General
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Button: [label]
button
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General
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Checkbox: [label]
checkbox
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General
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Radio: [label]
radio button
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General
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1. Navigate entire page with Tab key
listening to announcements
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General
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Combobox: [label]
combobox
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General
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Link: [text]
link
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General
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[ ] Arrow keys navigate within components (tabs
menus
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General
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| AAA | Enhanced | Contrast < 7:1
sign language
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General
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2. **Operable**: UI navigable by all input methods (keyboard
touch
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General
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[ ] Focus indicator visible (${focus_indicator_width:2}px+ outline
3:1 contrast)
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General
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| A | Minimum baseline | Missing alt text
no keyboard access
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General
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description: Tests and remediates accessibility issues for WCAG compliance and assistive technology compatibility. Use when (1) auditing UI for accessibility violations
(2) implementing keyboard navigation or screen reader support
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General
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| ${wcag_level:AA} | Standard target | Contrast < 4.5:1
missing focus indicators
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General
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| Lambda errors | >1% | >5% | Investigate
rollback |
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