Adding colored nodes is covered here.
However, a similar method does not work for edges, it seems.
At the moment the edges of my graph are different colors in NetworkX, but Gephi can't seem to see that.
I have tried:
edge[2]['viz'] = {color: {'r': 255, 'g': 0, 'b': 0, 'a': 0}}
and Gephi just ignores the color property.
Is there a way to add colored edges?
The issue here was that I had alpha 'a' set to 0.
Setting it to literally any positive number will solve the issue / save hours of your time.
edge[2]['viz'] = {color: {'r': 255, 'g': 0, 'b': 0, 'a': 1.0}}