Column color based on language(s)

[TWiStErRob]

Is your feature request related to a problem? Please describe.
Just an idea.

Describe the solution you'd like
There's color schemes that make the chart look nice, and there's the language pie chart with different colors. How about matching up the bars on the grid with the languages. e.g. each bar could be a column of the most touched language in that time range, or a stacked column in every time period for all the languages touched.

Additional context
I'm not sure how feasible this is given the GitHub API, but I think it would be an impressive "color scheme"