WAI: Strategies, guidelines, resources to make the Web accessible to people with disabilities
| Technique | Technology | Implementations |
|---|---|---|
| Not specifying background color, not specifying text color, and not using technology features that change those defaults | General | 1 |
| Ensuring that a contrast ratio of at least 7:1 exists between text (and images of text) and background behind the text | General | 3 |
| Providing a control with a sufficient contrast ratio that allows users to switch to a presentation that uses sufficient contrast | General | 1 |
| Ensuring that a contrast ratio of at least 5:1 exists between text (and images of text) and background behind the text | General | 7 |
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