> ## Documentation Index
> Fetch the complete documentation index at: https://anvil.servicetitan.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Semantic palette

> Compose semantic (status) chart colors for @servicetitan/anvil2-charts-kit.

export const LiveCode = ({children, customHeight, clickToLoad, example, fullWidth, fullHeight, hideCodeInLiveCode, screenshot, screenshotOnly, showCode: showCodeProp}) => {
  const SCREENSHOTS_BASE = "https://servicetitan.github.io/anvil2-docs-live-code/screenshots";
  const STACKBLITZ_BASE = "https://stackblitz.com/github/servicetitan/anvil2-docs-live-code/tree/main/examples";
  const [showCodeBlock, setShowCodeBlock] = useState(showCodeProp ?? false);
  const [isLocalOverride, setIsLocalOverride] = useState(false);
  useEffect(() => {
    const examplePath = `/images/live-code-screenshots-tmp/${example}.png`;
    fetch(examplePath, {
      method: "HEAD"
    }).then(r => {
      if (r.ok) setIsLocalOverride(true);
    }).catch(() => {});
  }, [example]);
  const screenshotBase = isLocalOverride ? "/images/live-code-screenshots-tmp" : SCREENSHOTS_BASE;
  if (screenshotOnly) {
    return <Frame className="flex flex-col">
        <div className="flex dark:hidden" style={{
      justifyContent: "center",
      alignItems: "center",
      width: fullWidth ? "100%" : "50%",
      minHeight: fullHeight ? "284px" : undefined,
      background: "#FFFFFF"
    }}>
          <img srcset={`${screenshotBase}/${example}.png, ${screenshotBase}/${example}-2x.png 2x`} src={`${screenshotBase}/${example}.png`} alt={example} noZoom />
        </div>
        <div className="hidden dark:flex" style={{
      justifyContent: "center",
      alignItems: "center",
      width: fullWidth ? "100%" : "50%",
      minHeight: fullHeight ? "284px" : undefined,
      background: "#141414"
    }}>
          <img srcset={`${screenshotBase}/${example}-dark.png, ${screenshotBase}/${example}-dark-2x.png 2x`} src={`${screenshotBase}/${example}-dark.png`} alt={example} noZoom />
        </div>
      </Frame>;
  }
  if (screenshot) {
    return <Frame className="flex flex-col -mb-2">
        <div className="flex dark:hidden bg-white dark:bg-codeblock border border-gray-950/10 dark:border-white/10 dark:twoslash-dark rounded-2xl overflow-hidden" style={{
      justifyContent: "center",
      alignItems: "center",
      width: fullWidth ? "100%" : "50%",
      minHeight: fullHeight ? "284px" : undefined
    }}>
          <img srcset={`${screenshotBase}/${example}.png, ${screenshotBase}/${example}-2x.png 2x`} src={`${screenshotBase}/${example}.png`} alt={example} noZoom />
        </div>

        <div className="hidden dark:flex bg-white dark:bg-codeblock border border-gray-950/10 dark:border-white/10 dark:twoslash-dark rounded-2xl overflow-hidden" style={{
      background: "#141414",
      justifyContent: "center",
      alignItems: "center",
      width: fullWidth ? "100%" : "50%",
      minHeight: fullHeight ? "284px" : undefined
    }}>
          <img srcset={`${screenshotBase}/${example}-dark.png, ${screenshotBase}/${example}-dark-2x.png 2x`} src={`${screenshotBase}/${example}-dark.png`} alt={example} noZoom />
        </div>

        <div className="flex justify-end items-center text-xs py-2 px-1 gap-4">
          {!showCodeProp ? <button className="inline-flex justify-end items-center text-gray-700 dark:text-gray-50 hover:text-blue-500 dark:hover:text-blue-300 transition-colors group self-end gap-1 cursor-pointer" onClick={() => setShowCodeBlock(!showCodeBlock)} style={{
      appearance: "none"
    }}>
              <Icon icon="code" size="12px" className="group-hover:bg-blue-500 dark:group-hover:bg-blue-300" />
              <span>{showCodeBlock ? "Hide code" : "Show code"}</span>
            </button> : null}

          <a className="inline-flex justify-end items-center hover:text-blue-500 dark:hover:text-blue-300 transition-colors group self-end gap-1" href={`${STACKBLITZ_BASE}/${example}?file=src/App.tsx`} target="_blank" rel="noreferrer">
            <Icon icon="bolt" size="12px" className="group-hover:bg-blue-500 dark:group-hover:bg-blue-300" />
            <span>StackBlitz demo</span>
          </a>
        </div>

        <div className="grid transition-[grid-template-rows] duration-300 ease-in-out overflow-auto overflow-y-hidden overflow-x-auto" style={showCodeBlock ? {
      gridTemplateRows: "1fr"
    } : {
      gridTemplateRows: "0fr"
    }}>
          <div style={{
      minHeight: 0,
      overflowX: "auto",
      overflowY: "hidden",
      marginBlockStart: "-1.25rem",
      marginBlockEnd: "-1.5rem"
    }}>
            {children}
          </div>
        </div>
      </Frame>;
  } else {
    return <div style={{
      display: "flex",
      width: fullWidth ? "100%" : "50%",
      minHeight: customHeight ? customHeight : "316px",
      resize: "vertical",
      overflow: "auto"
    }}>
        <iframe title={example} style={{
      flex: 1,
      width: fullWidth ? "100%" : "50%",
      minHeight: customHeight ? customHeight : "316px"
    }} src={`${STACKBLITZ_BASE}/${example}?embed=1&hideNavigation=1&hideExplorer=1&terminalHeight=0&file=src/App.tsx${clickToLoad ? "&ctl=1" : ""}${hideCodeInLiveCode ? "&view=preview" : ""}`} allow="accelerometer; ambient-light-sensor; camera; encrypted-media; geolocation; gyroscope; hid; microphone; midi; payment; usb; vr; xr-spatial-tracking" sandbox="allow-forms allow-modals allow-popups allow-presentation allow-same-origin allow-scripts" />
      </div>;
  }
};

The semantic palette is not a `variant`. Colors are selected by role, one of `success`, `warning`, `danger`, or `default`, and by urgency tier, one of `primary`, `secondary`, or `tertiary`. The palette has no fixed series order, so the consumer assigns a color per datum or series.

* Design: [Semantic color palette](/docs/web/data-visualization/semantic-color-palette)
* Shared API: [Chart component](/docs/kits/charts-react/chart)

```tsx theme={null}
const palette = chartPalette(appearance, "semantic");

// One role, three urgencies — impossible for an index-cycled variant:
itemStyle: chartStepItemStyle(palette.danger.primary);
itemStyle: chartStepItemStyle(palette.danger.secondary); // striped intermediate
itemStyle: chartStepItemStyle(palette.danger.tertiary); // pale + outline
```

Invoice aging is the reference case for the semantic palette. Three of the five segments share the `danger` role and differ only by urgency tier:

<LiveCode showCode example="charts-react-palette-semantic" fullWidth screenshot>
  ```tsx lines expandable theme={null}
  import {
    Chart,
    chartPalette,
    chartStepItemStyle,
    type EChartsOption,
  } from "@servicetitan/anvil2-charts-kit";
  import "@servicetitan/anvil2-charts-kit/styles.css";

  function App() {
    const appearance = "light" as const;
    const palette = chartPalette(appearance, "semantic");

    const buckets = [
      { name: "Current", value: 83414.75, step: palette.success.primary },
      { name: "1–30 days", value: 83414.75, step: palette.warning.primary },
      { name: "31–60 days", value: 29440.5, step: palette.danger.tertiary },
      { name: "61–90 days", value: 18000, step: palette.danger.secondary },
      { name: "90+ days", value: 24000, step: palette.danger.primary },
    ];

    const option: EChartsOption = {
      grid: { left: 8, right: 8, top: 8, bottom: 84 },
      legend: { bottom: 0 },
      xAxis: { type: "value", show: false },
      yAxis: { type: "category", show: false, data: ["Unpaid"] },
      series: buckets.map(({ name, value, step }) => ({
        type: "bar" as const,
        name,
        stack: "total",
        data: [value],
        itemStyle: chartStepItemStyle(step),
      })),
    };

    return (
      <Chart
        option={option}
        appearance={appearance}
        variant="categorical"
        height={180}
        width={560}
      />
    );
  }

  export default App;
  ```
</LiveCode>

The rendered ECharts option contains resolved hex values. Those are the output of `chartStepItemStyle` rather than values to author by hand, so resolve them through `chartPalette`.