User defined legend in python
I have this plot in which some areas between curves are being filled by definition. Is there any way to include them in legend? Especially where those filled areas are overlapped and as well as that a new and different color is being appeared.

<p>Or there is possibility to define an arbitrary legend regardless of the curves' data?
<a href="https://i.stack.imgur.com/NtJ74.png" rel="nofollow"><img src="https://i.stack.imgur.com/NtJ74.png" alt="enter image description here"></a></p>