The ability to change the colors of the lines on the graph to your own preference would be helpful to colorblind individuals. It would also just make a nice customization feature for those who like to customize their interface.
This is great feedback. I doubt I’d change these myself, however a colorblind mode/larger font options sounds great from an accessibility standpoint. I’d also consider some UX updates, specifically regarding setting the thresholds. These are less than user friendly to use for able bodied people, I imagine if I had impaired motor skills I’d find it challenging to work with.