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The node color is controlled through the color attribute. Multiple color formats are available: hexadecimal, RGB(A), and CSS color names.

Open in a new window.
          <!DOCTYPE html>
  <meta charset="utf-8">
  <script src="../build/ogma.min.js"></script>
    #graph-container { top: 0; bottom: 0; left: 0; right: 0; position: absolute; margin: 0; overflow: hidden; }
  <div id="graph-container"></div>

'use strict';

var COLORS = ['#161344','#3f1c4c','#632654','#86315b','#a93c63','#cd476a','#f35371'];

var ogma = new Ogma({
  container: 'graph-container'

// Create a rule that assigns a color to each node using a function.
// This function must be deterministic as it will be called each time the node is painted.
  color: function (n) { return COLORS[n.getId() % COLORS.length]; }

// Generate a random graph
ogma.generate.random( { nodes: 50, edges: 0 } )
  .then ( function (graph) {
    // Assign this graph to Ogma.

    // Color the node '0' in orange.
    ogma.getNode('0').setAttributes({color: 'orange'});

    // Color the nodes who have a coordinate x above 90 in purple.
    ogma.getNodes().filter(function (n) {
      return (n.getAttribute('x') > 90);
      color: 'purple'