Accessibility Support
Out of the box, the Telerik and Kendo UI ColorPicker provides extensive accessibility support and enables users with disabilities to acquire complete control over its features.
The ColorPicker is compliant with the Web Content Accessibility Guidelines (WCAG) 2.2 standards and Section 508 requirements, follows the Web Accessibility Initiative - Accessible Rich Internet Applications (WAI-ARIA) best practices for implementing the keyboard navigation for its component role, provides options for managing its focus and is tested against the most popular screen readers.
WAI-ARIA
This section lists the selectors, attributes, and behavior patterns supported by the component and its composite elements, if any.
The ColorPicker popup contains in itself ColorGradient, ColorPalette, a UI to switch between them, and a button to reset its value. All the containing elements must implement their own specification apart from the ColorGradient element where some changes are required.
ColorPicker Wrapping Element
| Selector | Attribute | Usage |
|---|---|---|
.k-colorpicker | role=combobox | The focusable element of the component should have role combobox (an input with popup). |
aria-label or aria-labelledby | The component needs an accessible name to be assigned to it. Must also include the currently selected value in the component. | |
aria-haspopup=dialog | Indicates the component has a Dialog Popup. | |
aria-expanded | Announces the state of the visibility of the popup. | |
aria-controls=.k-colorpicker-popup id | Points to the popup element. Signifies that the combobox element controls the dialog. | |
tabindex=0 | The element must be focusable. | |
.k-invalid,.ng-invalid | aria-invalid=true | Attribute is rendered only when the picker is in form and announces the valid state of the component. |
.k-colorpicker.k-disabled | aria-disabled=true | Attribute is rendered only when the picker is disabled. |
.k-colorpicker.k-disabled .k-button | disabled or aria-disabled=true | Attribute is rendered only when the picker is disabled. |
ColorGradient in the Popup
| Selector | Attribute | Usage |
|---|---|---|
.k-colorgradient | role=none/undefined | The ColorGradient element must have its role removed. |
aria-label=undefined | The ColorGradient element must have its aria-label attribute removed. | |
tabindex=-1/undefined | The ColorGradient must be removed from the page tab sequence. |
Keyboard Shortcuts
When k-colorpicker element is focused
| Shortcut | Behavior |
|---|---|
Alt/Opt(Mac) Down | Opens pop up |
Enter | Opens pop up |
Alt/Opt(Mac) Up or Esc | Closes popup |
When focus is in the Popup
When opened, the Popup element uses Tab navigation to iterate over its inner elements. The focus remains trapped within the Popup. The inner elements (ColorPlatte, ColorGradient and Buttonss implement their own specification).
| Shortcut | Behavior |
|---|---|
Esc | Closes Popup and moves focus back to k-colorpicker element. |
Tab | Navigates to the next focusable element in the Popup. If current focus is on the last element, moves focus to the first focusable item in the Popup. |
Shift + Tab | Navigates to the previous focusable element in the Popup. If current focus is on the first element, moves focus to the last focusable item in the Popup. |
Enter | For button items, executes the currently focused button action. |
Testing
The ColorPicker has been extensively tested automatically with axe-core and manually with the most popular screen readers.
Screen Readers
The ColorPicker has been tested with the following screen readers and browsers combinations:
| Environment | Tool |
|---|---|
| Firefox | NVDA |
| Chrome | JAWS |
| Microsoft Edge | JAWS |
