This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The border-block-start-color
CSS property defines the color of the logical block-start border of an element, which maps to a physical border color depending on the element's writing mode, directionality, and text orientation. It corresponds to the border-top-color
, border-right-color
, border-bottom-color
, or border-left-color
property depending on the values defined for writing-mode
, direction
, and text-orientation
.
The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.
Syntax
border-block-start-color: blue; border-block-start-color: #4c5d21;
Related properties are border-block-end-color
, border-inline-start-color
, and border-inline-end-color
, which define the other border colors of the element.
Initial value | currentcolor |
---|---|
Applies to | all elements |
Inherited | no |
Media | visual |
Computed value | computed color |
Animation type | discrete |
Canonical order | the unique non-ambiguous order defined by the formal grammar |
Values
<'color'>
- See
border-color
Formal syntax
<'border-top-color'>
Example
HTML Content
<div> <p class="exampleText">Example text</p> </div>
CSS Content
div { background-color: yellow; width: 120px; height: 120px; } .exampleText { writing-mode: vertical-lr; border: 10px solid blue; border-block-start-color: red; }
Specification
Specification | Status | Comment |
---|---|---|
CSS Logical Properties and Values Level 1 The definition of 'border-block-start-color' in that specification. |
Editor's Draft | Initial definition |
Browser compatibility
Desktop | Mobile | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic support | Chrome Full support 69 | Edge No support No | Firefox
Full support
41
| IE No support No | Opera Full support 56 | Safari No support No | WebView Android Full support 69 | Chrome Android ? | Edge Mobile No support No | Firefox Android
Full support
41
| Opera Android Full support 56 | Safari iOS No support No | Samsung Internet Android ? |
Legend
- Full support
- Full support
- No support
- No support
- Compatibility unknown
- Compatibility unknown
- Experimental. Expect behavior to change in the future.
- Experimental. Expect behavior to change in the future.
- User must explicitly enable this feature.
- User must explicitly enable this feature.
See also
- This property maps to one of the physical border properties:
border-top-color
,border-right-color
,border-bottom-color
, orborder-left-color
. writing-mode
,direction
,text-orientation