Blazor ColorPicker Accessibility
The Telerik UI for Blazor ColorPicker component is WCAG 2.1 AA and Section 508 compliant. The component also follows the WAI-ARIA best practices for implementing the keyboard navigation for its component role, and is tested against the popular screen readers.
Wai-Aria
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 wrapper
| 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. |
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. |
Section 508
The ColorPicker is compliant with the Section 508 requirements
Testing
The component has been extensively tested automatically with static code analyzers and manually with the most popular screen readers.
Any Accessibility Issues could be reported in Telerik Support System.
Screen Readers
| Environment | Tool |
|---|---|
| Firefox | NVDA |
| Chrome | JAWS |
| Microsoft Edge | JAWS |