Auto-generate != pill colors based on tag text

I found this useful, it makes tags much easier to distinguish if you actually have a few. The background color is automatically generated from the content of the string. Thus far I have found them readable though I am sure it could be improved.

!https://www.evernote.com/shard/s2/sh/353d2166-3281-4e27-8ef3-d3ad33b2565e/3384ffa47e316a4fc1492b65cb5959c5/deep/0/Grafana---Welcome.png!