How can I create a 30-day blood pressure chart with automatic color-coding in Django?

I'm developing a Django app to monitor my blood pressure and need a chart that shows measurements from the last 30 days.

The chart should have days on the x-axis and both systolic and diastolic pressures on the y-axis. Additionally, I want the chart to automatically apply colors based on the pressure levels (green for normal, orange for slightly high, red for too high).

What is the best approach to implement this functionality, and are there any recommended libraries or techniques for achieving it?