Color scale

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.15.0/lodash.min.js"></script>
  <script src="https://npmcdn.com/babel-core@5.8.34/browser.min.js"></script>
  <script type="text/javascript" src="https://cdn.jsdelivr.net/gh/gka/chroma.js/chroma.min.js"></script>

<body>
  <svg></svg>
  <script>
    var blue = '#51aae8';
    var pink = '#e68fc3';
    var orange = '#f7cd83';
    var green = '#55e851';
    var violet = '#a651e8';
    var red = '#e85151';
    var yellow = '#f7e883';
    var red2 = '#e85178';
    
    var colors = chroma
    	.scale([red, orange, yellow, green, blue, violet, pink, red2]).colors(36);
    var svg = d3.select('svg');
    
    var perRow = 6;
    var size = 100;
    var g = svg.selectAll('g')
    	.data(colors).enter().append('g')
    	.attr('transform', (d, i) => {
      	var x = (i % perRow + 1) * size;
      	var y = (Math.floor(i / perRow) + 1) * size;
      	return 'translate(' + [x, y] + ')';
      }).attr('fill', d => d);
    
    g.append('circle')
    	.attr('r', size / 4);
    
    g.append('text')
    	.attr('y', size / 4 + 15)
    	.attr('text-anchor', 'middle')
    	.attr('dy', '.35em')
    	.text((d, i) => d);

</script>
</body>

Updated missing url https://cdn.rawgit.com/gka/chroma.js/master/chroma.min.js to https://cdn.jsdelivr.net/gh/gka/chroma.js/chroma.min.js

https://d3js.org/d3.v4.min.js

https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.15.0/lodash.min.js

https://npmcdn.com/babel-core@5.8.34/browser.min.js

https://cdn.rawgit.com/gka/chroma.js/master/chroma.min.js