Choose what colors we should use for the consensus-health line graphs
A more comprehensive bug than https://trac.torproject.org/projects/tor/ticket/22108
https://consensus-health.torproject.org/graphs.html has two types of line graphs, the pure line graphs and the stacked area graphs.
We should identify 11 colors for the line graph (we expect to use the first 9 but let's hedge a little) that are user friendly, distinct, accessible to color blind people, etc.
And we should identify 5 colors for the stacked area graph. I had avoided using red because red implies 'bad' and technically none of the colors in the area graph is 'bad'. (Well, maybe Unmeasured could be considered 'bad'...?)
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