@vkess Right now the colors on the graph are based entirely on the table column the data is in. It's an ugly hard coded thing in the graph code that loops over about a dozen colors. Enlarging the number of colors available would only require changing a couple lines of code. The harder part is behavior changes associated with having more than 2 roasts loaded. Those can all be done in a local config, but making sure things like profile translation work would be subtle.
@vkess The graph code pending for v2 is really a lot better for this, having your likely use case already in mind and the ability to change colors/visibility of series on the fly.