The visual presentation of text and images of text has a contrast ratio of at least 4.5:1, except for the following: Large Text: Large-scale text and images of large-scale text have a contrast ratio of at least 3:1. Incidental: Text or images of text that are part of an inactive user interface component, that are pure decoration, that are not visible to anyone, or that are part of a picture that contains significant other visual content, have no contrast requirement. Logotypes: Text that is part of a logo or brand name has no minimum contrast requirement. 11.2.1.13 Resize text Where ICT is non-web software that provides a user interface and that supports access to enlargement features of platform or assistive technology, it shall satisfy the Success Criterion in Table 11.13: Resize text: Except for captions and images of text, text can be resized without assistive technology up to 200 percent without loss of content or functionality. Supported With Exceptions Text scaling is not supported within the onscreen keyboard and Cortana's connect account flow. 11.2.1.14 Images of text Where ICT is non-web software that provides a user interface and that supports access to assistive technologies for screen reading, it shall satisfy the Success Criterion in Table 11.14: Images of text: If the technologies being used can achieve the visual presentation, text is used to convey information rather than images of text except for the following: Customizable: The image of text can be visually customized to the user’s requirements. Essential: A particular presentation of text is essential to the information being conveyed. Supported 11.2.1.15 Keyboard Where ICT is non-web software that provides a user interface and that supports access to keyboards or a keyboard interface, it shall satisfy the Success Criterion in Table 11.1: Keyboard: All functionality of the content is operable through a keyboard interface without requiring specific timings for individual keystrokes, except the underlying function requires input that depends on the path of the user’s movement and not just the endpoints. Supported With Exceptions Within Keyboard settings, the external (Bluetooth) keyboard user will be unable to scroll the "Learn more" information. On Lumia phones, legacy settings within Extra are not accessible with external (Bluetooth) keyboards. Narrator voice speed cannot be adjusted via
Platform software shall provide a set of documented platform services that enable software that provides a user interface running on the platform software to interoperate with assistive technology. Platform software should support requirements 11.3.2.5 to 11.3.2.17 except that, where a user interface concept that corresponds to one of the clauses 11.3.2.5 to 11.3.2.17 is not supported within the software environment, these requirements are not applicable. For example, selection attributes from 11.3.2.14 (Modification of focus and selection attributes) may not exist in environments that do not allow selection, which is most commonly associated with copy and paste. Continuum's second screen but will continue to function normally with the phone's primary screen. 11.3.2.2 Platform accessibility service support for assistive technologies Platform software shall provide a set of documented platform accessibility services that enable assistive technology to interoperate with software that provides a user interface running on the platform software. Platform software should support the requirements of clauses 11.3.2.5 to 11.3.2.17 except that, where a user interface concept that corresponds to one of the clauses 11.3.2.5 to 11.3.2.17 is not supported within the software environment, these requirement are not applicable. Supported With Exceptions Narrator and Screen Magnifier are not supported on Continuum's second screen but will continue to function normally with the primary screen. 11.3.2.3 Use of accessibility services Where the software provides a user interface it shall use the applicable documented platform accessibility services. If the documented platform accessibility services do not allow the software to meet the applicable requirements of clauses 11.3.2.5 to 11.3.2.17, then software that provides a user interface shall use other documented services to interoperate with assistive technology. Supported With Exceptions Some Lumia-specific legacy settings have Settings "home" buttons which are not visible under high contrast but the buttons still function and the system Back button can also be used to return the user to Settings home. In Lumia Equalizer settings, equalizer level statistics will not render in high contrast but equalizer presets can still be adjusted. 11.3.2.4 Assistive technology Where the ICT is assistive technology it shall use the documented platform accessibility services. 11.3.2.5 Object information Supported