Hi @Steffano ,
You can set dynamic colors for the corresponding regions by clicking the fx flag in Format - Trend axis or Target value.
Here are the steps you can follow：
If you want the color and Value of the later trend graph to change, you can create a measure.
1. Create measure.
[Measure 2] >=1&&[Measure 2]<=14,"amber","yellow")
2. Trand axis – Bad color -fx.
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly