Python Plotly explress line - how to change the color under the line

Question

I have the following code

daily=pd.read_csv
y_columns= [\'1 mo\', \'2 mo\', \'3 mo\', \'6 mo\', \'1 yr\', \'2 yr\', \'3 yr\', \'5 yr\',
   \'7 yr\', \'10 yr\', \'