Gradient Color background on charts

[brunolelli87]

Dears,

Is it possible to create a gradiente color fill on a line chart, like this?

I'm trying to do it via expression, but I couldn't find anything like that.

My chart is currently like this:

Is is possible?
Thanks

[jwjackso · Accepted solution]

There is a gradient option under styles, but you have no control over the gradient.