Plotly's fillcolor defaults to half-transparency, want no-transparency

Question

I am trying to build a map in R using plotly. I will share the code required to build the dataframe in a reply to this post. Here is the code I am using to plot the chart:

Answer 1

Without modifying anything in Plotly, I found that you can add

alpha = 1

to add_trace/add_polygons to change it to completely opaque. So where you have your fillcolor comment, you can drop in

alpha = 

then 0-1, completely transparent to completely opaque.