Code List 196 - 37: Use of ultra-high contrast between text foreground and background

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Code List 196 - 37: Use of ultra-high contrast between text foreground and background

Explanation

Code 37 indicates that there is a contrast ratio of at least 7:1 between text and its background. The contrast ration must be at least 4.5:1 for large/heading text.

This code corresponds to WCAG 2 Success Criterion 1.4.6 Contrast (Enhanced). Publications should pass the requirements of that success criterion in order to declare this code.

Although the code's definition does not mention images of text as falling under its scope, the contrast requirement should also be assumed for images.

Refer to code 26 for minimum accessible contrast requirements.

Only for use in ONIX 3.0 or later.

Examples

Example 1 — Text with enhanced contrast

<ProductFormFeature>
   <ProductFormFeatureType>09</ProductFormFeatureType>
   <ProductFormFeatureValue>37</ProductFormFeatureValue>
</ProductFormFeature>

Applies To

EPUB 3	EPUB 2	Audiobooks
Yes	Yes	Partial *

* Applies to the table of contents and any supplementary HTML resources.

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