Colour schemes

<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@toclocoinc/lattice-grid@1.27.0/lattice-grid.min.css">
<style>
  #charts { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
  #charts > div { height: 200px; }
  #grid { margin-top: 14px; }
  #grid > div { height: 340px; }
</style>
<div id="app"></div>

<script type="module">
  import * as Vue from 'https://esm.sh/vue@3';
  import { createGrid } from 'https://cdn.jsdelivr.net/npm/@toclocoinc/lattice-grid@1.27.0/lattice-grid.esm.min.js';
  import createLatticeGrid from 'https://cdn.jsdelivr.net/npm/@toclocoinc/lattice-grid@1.27.0/modules/vue.esm.min.js';
  import { createChart } from 'https://cdn.jsdelivr.net/npm/@toclocoinc/lattice-grid@1.27.0/modules/charts.esm.min.js';

  const LatticeGrid = createLatticeGrid({ vue: Vue, createGrid });

  Vue.createApp({
    components: { LatticeGrid },
    data() {
      return {
        config: {
          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,
        },
      };
    },
    mounted() {
      // The component exposes the live grid via a template ref. Every chart reads
      // that one instance and paints it in a different palette.
      const grid = this.$refs.grid.grid();
      // 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' });
    },
    template: `
      <div id="charts">
        <div id="default"></div>
        <div id="bright"></div>
        <div id="earth"></div>
        <div id="mono"></div>
      </div>
      <div id="grid"><lattice-grid ref="grid" v-bind="config" /></div>
    `,
  }).mount('#app');
</script>