Wish: Color sublayers and parents for better visual navigation

Hi, when working on large files with lots of layers and sublayers it would be nice to visually separate the parents better. Here is a simple file layout to get the point across:

And to me it would be great if the sub layers and sub sub layers were graded like this:

That way it is easier to see that the layers are expanded etc.

And I would further wish for custom color grading like this for even faster and better navigation: