title: HeatMap / Histogram Chart in Chart.js
body: <p>How to create histogram / heat map chart like the snapshot in chart.js. </p>
  
  <p>Requirement is to plot days of week on x axis (Sun, Mon, Tues) and time in hour on y axis (1-12 or 24). All the values will be shown in the color range lighter to darker <a href="https://i.stack.imgur.com/XCZra.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/XCZra.jpg" alt="enter image description here"></a></p>