How to set colorscale in ribbon chart?

[dontpanic21]

Hi, I've seen the answer to #335 and #319 from @howick19 but I don't know how to adapt the answer to #319, which is a line color, into a colorscale.

Could I please have an example of setting a colorscale to one of the built in color scales and also how to create my own scale?

Also is

@using Plotly.Blazor.LayoutLib.ColorAxisLib;

the correct namespace to get built in colorscales?

thanks