[charts] Apply axis colorMap to radial bar fill#22800
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The radialBar color processor was defined but never invoked, so a colorMap on the rotation or radius axis was ignored and every bar used the series color. Call the processor in useRadialBarPlotData, mirroring BarChart, so the band axis colorMap colors each bar. Add a 'Coloring each bar' docs section with a health dashboard demo.
JCQuintas
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| ## Coloring each bar | ||
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| Set a `colorMap` on the band axis to give each category its own color. | ||
| With `layout='horizontal'` the band categories sit on the `radiusAxis`, so an `'ordinal'` color map there paints each concentric ring independently. | ||
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| The demo below uses this to build a health dashboard where every metric ring tracks progress toward its goal. | ||
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| {{"demo": "HealthRadialBarChart.js", "bg": "outline"}} |
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This section of the docs let me think only the band axis can have a color map
Might be better to link to the bar charts docs section about colorMap saying that x/y axes are replaced by rotation/radius
alexfauquette
approved these changes
Jun 19, 2026
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Motivation
The
radialBarseries already defined a color processor (getColor), butuseRadialBarPlotDatanever invoked it — it assignedseriesItem.colordirectly. As a result acolorMapset on the rotation or radius axis was silently ignored and every bar fell back to the series color.Changes
useRadialBarPlotData, mirroringuseBarPlotDatain the cartesianBarChart. The band axiscolorMapnow colors each bar.HealthRadialBarChart) where each metric ring uses an ordinalcolorMapon theradiusAxis.In
layout='horizontal'the band categories live on theradiusAxis, so an'ordinal'color map there paints each concentric ring independently.