Polar graph - one grid line odd

Hi All,

I’m creating a plot showing stars in the sky and constellation lines. It’s working quite nicely, but one grid line (the one where the tick values would normally go on the radial line) is showing a different lines style to the others. It seems to have a white line on top. Does anyone know what I might be doing wrong? It’s the line pointing to W:

The code I have so far for the plot is shown below - any ideas?



    polar = dict(
        bgcolor = "white",
        radialaxis = dict(
            range=[90, 0], 
            gridcolor = 'black'
        angularaxis = dict(
            direction = "counterclockwise", 
            rotation = 90,
            period = 360,
            tickvals = [0, 45, 90, 135, 180, 225, 270, 315],
            ticktext = ['N', 'NE', 'E', 'SE', 'S', 'SW', 'W', 'NW'],
            gridcolor = 'orange'
    showlegend = False,
    width=700,  # Set the initial width
    height=700  # Set the initial height

To answer my own question! You need to set the linecolor for each axis as well as the gridcolor… that fixed it!