This original dark template starts with a pale semi-transparent red color for the first series, a less transparent red color for the second, and ends up lighting up the fire with a plain solid red. In a multi-series bar chart with the grid ON, you could see the grid lines through the first two series, but not through the third series. We also show by default the cross-hairs or the trackball, when available. This is a good template to test chart app capabilities for semi-transparent palette colors, combined eventually with solid opaque colors.
For CanvasJS. You may need a separate commercial license from CanvasJS for their charts.