Fat % tracking

Working on an app for athletes (in this case footballers)
They can track their weight, fat %, hydration needs (fluid loss during training), and urine gravity.

This screen is the tracking of your fat % (blue line), and you can compare it to your team's average, or check if you're on target or not. You can add a new point to the graph by clicking the "new entry" button. The other screens with graphs are: weight, urine gravity, fluid needs.

i'll probably have to change the colors to the clients own style.
But i found these colors just perfect.

Any tips/feedback/comments?