Victory lets you create fully custom charts that integrate seamlessly with the look and feel of your project. The following guide demonstrates how custom styles and modular chart components are used to create a cohesive chart with distinctive branding.

The following example shows how to create a chart with multiple independent axes without using the VictoryChart wrapper. This example also includes functional styles and axis customization.

---

function CustomTheme() {
  const styles = getStyles();
  const dataSetOne = getDataSetOne();
  const dataSetTwo = getDataSetTwo();
  const tickValues = getTickValues();

  return (
    <svg style={styles.parent} viewBox="0 0 450 350">

      {/* Create stylistic elements */}
      <rect x="0" y="0" width="10" height="30" fill="#f01616"/>
      <rect x="420" y="10" width="20" height="20" fill="#458ca8"/>

      {/* Define labels */}
      <VictoryLabel x={25} y={24} style={styles.title}
        text="An outlook"
      />
      <VictoryLabel x={430} y={20} style={styles.labelNumber}
        text="1"
      />
      <VictoryLabel x={25} y={55} style={styles.labelOne}
        text={"Economy \n % change on a year earlier"}
      />
      <VictoryLabel x={425} y={55} style={styles.labelTwo}
        text={"Dinosaur exports\n $bn"}
      />

      <g transform={"translate(0, 40)"}>
        {/* Add shared independent axis */}
        <VictoryAxis
          scale="time"
          standalone={false}
          style={styles.axisYears}
          tickValues={tickValues}
          tickFormat={
            (x) => {
              if (x.getFullYear() === 2000) {
                return x.getFullYear();
              }
              if (x.getFullYear() % 5 === 0) {
                return x.getFullYear().toString().slice(2);
              }
            }
          }
        />

        {/*
          Add the dependent axis for the first data set.
          Note that all components plotted against this axis will have the same y domain
        */}
        <VictoryAxis dependentAxis
          domain={[-10, 15]}
          offsetX={50}
          orientation="left"
          standalone={false}
          style={styles.axisOne}
        />

        {/* Red annotation line */}
        <VictoryLine
          data={[
            {x: new Date(1999, 1, 1), y: 0},
            {x: new Date(2014, 6, 1), y: 0}
          ]}
          domain={{
            x: [new Date(1999, 1, 1), new Date(2016, 1, 1)],
            y: [-10, 15]
          }}
          scale={{x: "time", y: "linear"}}
          standalone={false}
          style={styles.lineThree}
        />

        {/* dataset one */}
        <VictoryLine
          data={dataSetOne}
          domain={{
            x: [new Date(1999, 1, 1), new Date(2016, 1, 1)],
            y: [-10, 15]
          }}
          interpolation="monotoneX"
          scale={{x: "time", y: "linear"}}
          standalone={false}
          style={styles.lineOne}
        />

        {/*
          Add the dependent axis for the second data set.
          Note that all components plotted against this axis will have the same y domain
        */}
        <VictoryAxis dependentAxis
          domain={[0, 50]}
          orientation="right"
          standalone={false}
          style={styles.axisTwo}
        />

        {/* dataset two */}
        <VictoryLine
          data={dataSetTwo}
          domain={{
            x: [new Date(1999, 1, 1), new Date(2016, 1, 1)],
            y: [0, 50]
          }}
          interpolation="monotoneX"
          scale={{x: "time", y: "linear"}}
          standalone={false}
          style={styles.lineTwo}
        />
      </g>
    </svg>
  );
}

function getDataSetOne() {
  return [
    {x: new Date(2000, 1, 1), y: 12},
    {x: new Date(2000, 6, 1), y: 10},
    {x: new Date(2000, 12, 1), y: 11},
    {x: new Date(2001, 1, 1), y: 5},
    {x: new Date(2002, 1, 1), y: 4},
    {x: new Date(2003, 1, 1), y: 6},
    {x: new Date(2004, 1, 1), y: 5},
    {x: new Date(2005, 1, 1), y: 7},
    {x: new Date(2006, 1, 1), y: 8},
    {x: new Date(2007, 1, 1), y: 9},
    {x: new Date(2008, 1, 1), y: -8.5},
    {x: new Date(2009, 1, 1), y: -9},
    {x: new Date(2010, 1, 1), y: 5},
    {x: new Date(2013, 1, 1), y: 1},
    {x: new Date(2014, 1, 1), y: 2},
    {x: new Date(2015, 1, 1), y: -5}
  ];
}

function getDataSetTwo() {
  return [
    {x: new Date(2000, 1, 1), y: 5},
    {x: new Date(2003, 1, 1), y: 6},
    {x: new Date(2004, 1, 1), y: 4},
    {x: new Date(2005, 1, 1), y: 10},
    {x: new Date(2006, 1, 1), y: 12},
    {x: new Date(2007, 2, 1), y: 48},
    {x: new Date(2008, 1, 1), y: 19},
    {x: new Date(2009, 1, 1), y: 31},
    {x: new Date(2011, 1, 1), y: 49},
    {x: new Date(2014, 1, 1), y: 40},
    {x: new Date(2015, 1, 1), y: 21}
  ];
}

function getTickValues() {
  return [
    new Date(1999, 1, 1),
    new Date(2000, 1, 1),
    new Date(2001, 1, 1),
    new Date(2002, 1, 1),
    new Date(2003, 1, 1),
    new Date(2004, 1, 1),
    new Date(2005, 1, 1),
    new Date(2006, 1, 1),
    new Date(2007, 1, 1),
    new Date(2008, 1, 1),
    new Date(2009, 1, 1),
    new Date(2010, 1, 1),
    new Date(2011, 1, 1),
    new Date(2012, 1, 1),
    new Date(2013, 1, 1),
    new Date(2014, 1, 1),
    new Date(2015, 1, 1),
    new Date(2016, 1, 1)
  ];
}

function getStyles() {
  const BLUE_COLOR = "#00a3de";
  const RED_COLOR = "#7c270b";

  return {
    parent: {
      background: "#ccdee8",
      boxSizing: "border-box",
      display: "inline",
      padding: 0,
      fontFamily: "'Fira Sans', sans-serif"
    },
    title: {
      textAnchor: "start",
      verticalAnchor: "end",
      fill: "#000000",
      fontFamily: "inherit",
      fontSize: "18px",
      fontWeight: "bold"
    },
    labelNumber: {
      textAnchor: "middle",
      fill: "#ffffff",
      fontFamily: "inherit",
      fontSize: "14px"
    },

    // INDEPENDENT AXIS
    axisYears: {
      axis: { stroke: "black", strokeWidth: 1},
      ticks: {
        size: ({ tick }) => {
          const tickSize =
            tick.getFullYear() % 5 === 0 ? 10 : 5;
          return tickSize;
        },
        stroke: "black",
        strokeWidth: 1
      },
      tickLabels: {
        fill: "black",
        fontFamily: "inherit",
        fontSize: 16
      }
    },

    // DATA SET ONE
    axisOne: {
      grid: {
        stroke: ({ tick }) =>
          tick === -10 ? "transparent" : "#ffffff",
        strokeWidth: 2
      },
      axis: { stroke: BLUE_COLOR, strokeWidth: 0 },
      ticks: { strokeWidth: 0 },
      tickLabels: {
        fill: BLUE_COLOR,
        fontFamily: "inherit",
        fontSize: 16
      }
    },
    labelOne: {
      fill: BLUE_COLOR,
      fontFamily: "inherit",
      fontSize: 12,
      fontStyle: "italic"
    },
    lineOne: {
      data: { stroke: BLUE_COLOR, strokeWidth: 4.5 }
    },
    axisOneCustomLabel: {
      fill: BLUE_COLOR,
      fontFamily: "inherit",
      fontWeight: 300,
      fontSize: 21
    },

    // DATA SET TWO
    axisTwo: {
      axis: { stroke: RED_COLOR, strokeWidth: 0 },
      tickLabels: {
        fill: RED_COLOR,
        fontFamily: "inherit",
        fontSize: 16
      }
    },
    labelTwo: {
      textAnchor: "end",
      fill: RED_COLOR,
      fontFamily: "inherit",
      fontSize: 12,
      fontStyle: "italic"
    },
    lineTwo: {
      data: { stroke: RED_COLOR, strokeWidth: 4.5 }
    },

    // HORIZONTAL LINE
    lineThree: {
      data: { stroke: "#e95f46", strokeWidth: 2 }
    }
  };
}

render(<CustomTheme/>);