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https://issues.apache.org/jira/browse/SPARK-55853?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kent Yao resolved SPARK-55853.
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Fix Version/s: 4.2.0
Resolution: Fixed
Issue resolved by pull request 54640
[https://github.com/apache/spark/pull/54640]
> Migrate hardcoded CSS colors to Bootstrap 5 CSS custom properties
> -----------------------------------------------------------------
>
> Key: SPARK-55853
> URL: https://issues.apache.org/jira/browse/SPARK-55853
> Project: Spark
> Issue Type: Sub-task
> Components: Web UI
> Affects Versions: 4.2.0
> Reporter: Kent Yao
> Assignee: Kent Yao
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.2.0
>
>
> Prerequisite for dark mode (SPARK-55766). Migrate ~150 hardcoded color values
> across webui.css (46), timeline-view.css (64), spark-dag-viz.css (33), and
> spark-sql-viz.css (7) to Bootstrap 5 CSS custom properties (--bs-body-bg,
> --bs-body-color, --bs-border-color, etc.).
> This is a mechanical refactor that replaces hex colors (#fff, #08c, #f9f9f9,
> etc.) and rgb() values with BS5 CSS variables that automatically adapt to the
> active theme. Once done, adding data-bs-theme="dark" will seamlessly switch
> the entire UI to dark mode.
> Also includes JS files that embed inline colors (e.g., stagepage.js striping
> colors).
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