We offer a lot of ways to slice colors, set cmaps and cmap transforms, they are really useful in neuroscience:

https://fastplotlib.org/ver/dev/_gallery/line/line_colorslic...

https://fastplotlib.org/ver/dev/_gallery/line/line_cmap_more...

https://fastplotlib.org/ver/dev/_gallery/line/line_cmap.html...

And with collections if you want to go crazy: https://fastplotlib.org/ver/dev/_gallery/line_collection/lin...