Orsdxy

I need to draw the x,y,z axis of my bloch sphere in black (with an arrow at the end of them).

I tried this code which doesn't work (my axis are light grey).

How to fix it ? I am not sure to understand how to use the options.

documentclass{standalone}



usepackage{blochsphere}



begin{document}



begin{blochsphere}[radius=1.5 cm,tilt=15,rotation=-20]

    drawBallGrid[style={opacity=0.1}]{30}{30}



    drawGreatCircle[style={dashed}]{0}{0}{0}



    drawAxis[style={draw=black}]{0}{0}



    drawAxis[color=black]{90}{0}



    labelLatLon{up}{90}{0};

    labelLatLon{down}{-90}{90};

    node[above] at (up) {{tiny $left|0right>$ }};

    node[below] at (down) {{tiny $left|1right>$}};





end{blochsphere}

end{document}

The result :

As you can see the lines are light grey and not black.

Important info : I never used tikz, I just read the documentation to see how it works (because apparently the BlochSphere package is based on it).

Documentation of the Bloch Sphere package : http://ctan.math.washington.edu/tex-archive/graphics/pgf/contrib/blochsphere/blochsphere.pdf

These element are either obscured by the sphere, as pointed out by KJO, or have not full opacity, which makes them look gray. So you can draw them by hand and change the opacity to arrive at

documentclass{standalone}



usepackage{blochsphere}



begin{document}



begin{blochsphere}[radius=1.5 cm,tilt=15,rotation=-20]

   drawBallGrid[style={opacity=1,ultra thin}]{30}{30}



    drawGreatCircle[style={dashed}]{0}{0}{0}



%    drawAxis[style={draw=black}]{0}{0}

% 

%     drawAxis[style={color=black,opacity=1}]{90}{0}



    labelLatLon{up}{90}{0};

    labelLatLon{down}{-90}{90};

    node[above,font=tiny] at (up) {$left|0right>$ };

    node[below,font=tiny] at (down) {$left|1right>$};

    labelLatLon{l}{0}{180};

    labelLatLon{r}{0}{0};

    draw (l) -- (r);

end{blochsphere}

end{document}

Whether one should draw the cross line black is a matter of taste.

Encouraged by @marmot 's expert example I finally got this MWE of original request, note I had to drop ball opacity to 0.3

documentclass{standalone}



usepackage{blochsphere}



begin{document}



begin{blochsphere}[ball=3d,opacity=0.3]

   drawBallGrid[style={opacity=1,ultra thin}]{30}{30}

   drawAxis[scale=1.2]{0}{0}

    drawAxis[scale=1.8]{90}{90}

    drawAxis[scale=1.4]{90}{0}

    labelLatLon{up}{90}{20};

    labelLatLon{down}{-90}{90};

    node[above,{shift=(0,0.2,0)}] at (up) {tiny N};

    node[below,{shift=(0,-0.2,0)}] at (down) {tiny S};

    end{blochsphere}



end{document}