Working on a new theme....

[Guido1982]

Ah, I'm not familiar enough with licences, but good call.

I've had a look, and at first glance it looks like Chart.js is even more comprehensive than c3.js. I like the fact that it is very well documented, that indicates it is a project that people care about. So yes, I think Chart.js could very well be a good replacement (or maybe even improvement) for c3.js