accessibility-checker-engine
Version:
An automated accessibility checking engine for use by other tools
101 lines (87 loc) • 4.88 kB
HTML
<html lang="en-US">
<head>
<title>style_highcontrast_visible - Accessibility Checker Help</title>
<script>
RULE_MESSAGES = {"en-US":{"Pass_0":"Rule Passed","Manual_1":"Confirm Windows high contrast mode is supported when using CSS to include, position or alter non-decorative content","group":"Windows high contrast mode must be supported when using CSS to include, position or alter non-decorative content"}};
RULE_ID = "style_highcontrast_visible"
</script>
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<link rel="icon" href="https://ibm.com/able/favicon-32x32.png" type="image/png">
<link rel="icon" href="https://ibm.com/able/favicon.svg" type="image/svg+xml">
<link rel="stylesheet" href="../common/help.css" />
<script type="module">
import "https://1.www.s81c.com/common/carbon/web-components/version/v1.35.0/code-snippet.min.js";
import "https://1.www.s81c.com/common/carbon/web-components/version/v1.35.0/list.min.js";
</script>
<script src="https://cdn.jsdelivr.net/npm/marked/marked.min.js"></script>
<script src="../common/help.js"></script>
</head>
<body>
<div class="bx--grid toolHelp">
<div class="bx--row">
<div class="bx--col-sm-4 bx--col-md-8 bx--col-lg-16 toolHead">
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<h3 id="ruleMessage"></h3>
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<div id="locLevel"></div>
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<p id="groupLabel"></p>
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<div class="bx--row">
<div class="bx--col-sm-4 bx--col-md-5 bx--col-lg-8 toolMain">
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<mark-down><script type="text/plain">
### Why is this important?
Windows high contrast mode alters the way Web content is displayed by disabling certain CSS features.
Applications that use CSS to include, position, or alter non-decorative content may have issues, such as the disappearance of images or UI elements when Windows high contrast mode is enabled.
Another example is the disappearance of icons, visual focus indicators, and visual alterations of UI elements with Windows high contrast mode enabled.
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<div id="locSnippet"></div>
### What to do
* On a Windows machine, activate high contrast mode
* **And**, confirm all UI elements are visible and inherit the selected high contrast theme
* **And**, confirm that checkboxes, radio buttons and text entry field boundaries are visible with good contrast
* **And**, confirm the visual focus indicator is highly visible
* **And**, confirm that all images that convey information are visible, or a text alternative is displayed
* **And**, confirm that only decorative images are no longer visible
</script></mark-down>
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<div id="ruleInfo"></div>
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<div class="bx--col-sm-4 bx--col-md-3 bx--col-lg-4 toolSide">
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<mark-down><script type="text/plain">
### About this requirement
* [IBM 1.1.1 Non-text content](https://www.ibm.com/able/requirements/requirements/#1_1_1)
* [IBM 1.3.2 Meaningful sequence](https://www.ibm.com/able/requirements/requirements/#1_3_2)
* [IBM 1.4.11 Non-text contrast](https://www.ibm.com/able/requirements/requirements/#1_4_11)
* [Design - Component contrast](https://www.ibm.com/able/toolkit/design/visual/#components-contrast)
* [G207: Ensure contrast for icons](https://www.w3.org/WAI/WCAG22/Techniques/general/G207)
* [Failure F1: CSS positioning that changes the meaning](https://www.w3.org/WAI/WCAG22/Techniques/failures/F1)
* [Failure F3: CSS images that convey important information](https://www.w3.org/WAI/WCAG22/Techniques/failures/F3)
### Who does this affect?
* People with visual impairment using color contrast enhancement
</script></mark-down>
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</body>
</html>