Change color of line

I’m editing a graph, it’s not letting me change the color of a line.

The color choice popup happens, but clicks are ignored.

This is so annoying - is there a place I can just hardcore a hex color value against that field?

When you say “the color choice popup happens”, does it look like this?
ColorOfLine

Yes.

I think this may be a bug. When I alter the label text, the color also randomly changes - that makes no sense at all.

Yes, it sounds like it could be a bug, but I have never seen it. For what it’s worth, I am using Grafana v7.4.3