Colour schemes

<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@toclocoinc/lattice-grid@1.13.0/lattice-grid.min.css">
<script src="https://cdn.jsdelivr.net/npm/@toclocoinc/lattice-grid@1.13.0/lattice-grid.min.js"></script>

<div style="display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; height: 210px">
  <div id="default"></div>
  <div id="bright"></div>
  <div id="earth"></div>
  <div id="mono"></div>
</div>
<div id="grid" style="height: 340px; margin-top: 14px"></div>

<script type="module">
  import { createChart } from 'https://cdn.jsdelivr.net/npm/@toclocoinc/lattice-grid@1.13.0/modules/charts';

  const grid = LatticeGrid.createGrid(document.getElementById('grid'), {
    rowKey: 'id',
    columns: [
      { field: 'circuit', title: 'Circuit', layout: { width: 180 } },
      { field: 'region', title: 'Region', filter: { type: 'set' } },
      { field: 'status', title: 'Status', filter: { type: 'set' } },
      { field: 'bandwidth', title: 'Bandwidth', type: 'number' },
      { field: 'charge', title: 'Monthly charge', type: 'number',
        format: { style: 'currency', currency: 'GBP' }, total: 'sum' },
    ],
    rows,
  });

  // The default scheme is the colour-blind-safe palette.
  createChart({ grid, container: '#default', type: 'pie', x: 'region', y: 'charge', scheme: 'default' });
  createChart({ grid, container: '#bright',  type: 'pie', x: 'region', y: 'charge', scheme: 'bright' });
  createChart({ grid, container: '#earth',   type: 'pie', x: 'region', y: 'charge', scheme: 'earth' });
  createChart({ grid, container: '#mono',    type: 'pie', x: 'region', y: 'charge', scheme: 'mono' });
</script>