Changing the color palette is not currently supported, unfortunately. We do have plans for a dark theme that will use different colors for charts, but there's no timeline for when it will be added. Thanks for your feedback! Finding the right color scheme is a challenging task, especially when the number of displayed elements can be quite large.

I agree that the colors used in plotting are too close to each other. I am sure it is a challenge. But I think there is room for improvement.

Use of different line types (solid, dots, dashes, ...) or line markers (dots, squares, triangles, upside-down triangles, stars, etc.) can be an option that would be a big help for those of us with poor color vision.