Hacker News Reader

All it needs is a key showing what shade is 50/50. Unfortunately one isn't provided...

Good call. Map updated to include a key!

The key isn't that helpful. Suggestion: a color slider showing continuity between two (asymptotic) extremes.

Better yet would be quantizing it into 10 or 20% buckets so people could better guage a given state more easily.

Sure, a key is provided. Look at the colour of Florida!