The spectrum of color only represents percentages between 7.8 and 17.6%. I imagine it would look a lot less dramatic if the scale was from 0% (bright red), to

The spectrum of color only represents percentages between 7.8 and 17.6%. I imagine it would look a lot less dramatic if the scale was from 0% (bright red), to 100% (bright green). It would also be interesting to have a slider to adjust the threshold point (it's currently fixed at 50%).