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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 cssxref border-top-color , cssxref border-right-color , cssxref border-bottom-color , or cssxref border-left-color property depending on the values defined for cssxref writing-mode , cssxref direction , and cssxref text-orientation .
Last updated on : 2023-02-27
Browser Versions
IE
Edge
Firefox
Chrome
Safari
Opera
Fully Supported
Partially
No Support
border-block-start-color on IE is not supported on any IE versions.
border-block-start-color on Edge is fully supported on 79-110, and not supported on 12-18 Edge versions.
border-block-start-color on Firefox is fully supported on 41-112, and not supported on 2-40 Firefox versions.
border-block-start-color on Chrome is fully supported on 69-113, and not supported on 4-68 Chrome versions.
border-block-start-color on Safari is fully supported on 12-16, partially supported on null-null, and not supported on 0-11 Safari versions.
border-block-start-color on Opera is not supported on any Opera versions.
border-block-start-color on Safari on iOS is fully supported on 12-16, and not supported on 3-11 Safari on iOS versions.
border-block-start-color on Android Browser support is currently unknown.
border-block-start-color on Opera Mobile is not supported on any Opera Mobile versions.
border-block-start-color on Chrome for Android is fully supported on all Chrome for Android versions.
border-block-start-color on Firefox for Android is fully supported on all Firefox for Android versions.
border-block-start-color on Samsung Internet is fully supported on 12-19, and not supported on 4-11 Samsung Internet versions.
Data sourced from
Overall Browser Compatibility Score
Note:border-block-start-color shows a browser compatibility score of 67. This is a collective score out of 100 to represent browser support of a web technology. The higher this score is, the greater is the browser compatibility. The browser compatibility score is not a 100% reflection for every browser and the web technology support. However, it does give you an estimate on how much you should rely on a particular web technology in terms of browser compatibility.
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