D3 Examples - d3 Color

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<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
  </style>
</head>
​
<body>
  <script>
       const data_points = [
      { x: 100, y: 300, type: 'apple'},
      { x: 200, y: 100, type: 'banana'},
      { x: 300, y: 200, type: 'grape'},
      { x: 400, y: 200, type: 'grape'},
      { x: 500, y: 400, type: 'banana'},
    ]
        const colorScale = d3.scaleOrdinal()
        .domain(['apple', 'banana', 'grape'])
        .range(['red', 'yellow', 'purple'])
    
    const svg = d3.select("body").append("svg")
      .attr("width", 600)
      .attr("height", 600)
        .style("background-color", "skyblue")
​
    svg.selectAll('circle')
        .data(data_points)
        .enter()
        .append('circle')
        .attr('r', 5)
        .attr('cx', d => d.x)
      .attr('cy', d => d.y)
        .attr('fill', d => colorScale(d.type))
  </script>
</body>
​
    