Visualization in a plot with several curves

Hi, I was trying to plot ROC curves of several models with bob bio roc. Since there are many curves in a plot, it is hard to understand each one and distinguish them. Below, you can find a sample of such plot:

I was wondering how I can achieve a better visualization. If we use --line-styles option in bob bio roc we will have a result as below which is still not clear:

I was searching if I could find a better color map and change the color map of matplotlib. Inspired by this plot, I changed the color map by replacing this line in bob.measure with cmap = pyplot.cm.get_cmap(name='gist_ncar')- only changing the color map. Here is the result:

And if I use --line-styles option as well, it results the following plot while the above plot is still more clear: