Scatter plot points are all black/grayscale as of 0.7.8

Using FF + all Chrome-based browsers I looked at at D3 version 5.15.

Example: http://jsfiddle.net/h9xumgje/3/ (based on the example scatter plot on the C3 homepage). If you remove C3 and add it back using version 0.7.7 it works just fine. The legend colors always work; it's just the data points that are black.

If there was an API change in 0.7.8 to get the colors working, that change isn't reflected in the example on the C3 homepage.