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Posted to notifications@superset.apache.org by "VasilijeBursac (via GitHub)" <gi...@apache.org> on 2025/09/15 21:26:15 UTC
[I] Cell bars in Table chart barely visible in dark themes [superset]
VasilijeBursac opened a new issue, #35145:
URL: https://github.com/apache/superset/issues/35145
## Screenshot
Dark theme (bars barely or not visible):
<img width="880" height="247" alt="Image" src="https://github.com/user-attachments/assets/bb74379b-9600-490a-81d7-dd5aef186a69" />
Light theme (bars visible):
<img width="873" height="228" alt="Image" src="https://github.com/user-attachments/assets/701a7c47-70b4-41a6-9ac2-221e570319ef" />
## Description
When using the Table chart in Superset, the cell bars are almost invisible in dark themes.
- On lighter zebra stripe rows, they are very faint and only noticeable at certain viewing angles.
- On darker rows, they are not visible at all.
In comparison, the bars are clearly visible in the light theme.
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Re: [I] Cell bars in Table chart barely visible in dark themes [superset]
Posted by "msyavuz (via GitHub)" <gi...@apache.org>.
msyavuz commented on issue #35145:
URL: https://github.com/apache/superset/issues/35145#issuecomment-3299628077
Thanks for reporting this @VasilijeBursac! I agree the bars are not really visible
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Re: [I] Cell bars in Table chart barely visible in dark themes [superset]
Posted by "mistercrunch (via GitHub)" <gi...@apache.org>.
mistercrunch closed issue #35145: Cell bars in Table chart barely visible in dark themes
URL: https://github.com/apache/superset/issues/35145
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Re: [I] Cell bars in Table chart barely visible in dark themes [superset]
Posted by "dosubot[bot] (via GitHub)" <gi...@apache.org>.
dosubot[bot] commented on issue #35145:
URL: https://github.com/apache/superset/issues/35145#issuecomment-3294019066
<!-- Answer -->
This is a known visibility issue in Superset's dark mode, but there isn't an existing ticket or documentation specifically for Table chart cell bars. The root cause is that the cell bar color is hardcoded (e.g., `#eaeaea`) in the Table chart's rendering logic, so it doesn't adapt to dark themes and becomes nearly invisible on dark backgrounds. There’s no conditional logic to switch the bar color based on the current theme, unlike some recent theming fixes for other chart types ([example](https://github.com/apache/superset/pull/35123)).
To improve visibility, the bar color should be set using theme variables or conditional logic depending on the active theme, rather than a fixed color. As a workaround, you could override the relevant CSS or update the cell bar rendering code to use a more visible color in dark mode.
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