Customize dot colors for instrument practice charts

Please allow for me to change the colours of the dots assigned to an instrument. I have many colours of guitars that I would like to match up with the dots. It's very weird to me seeing my purple guitar with a yellow dot and another guitar with the purple dot. And I have a red guitar with a green dot and the unknown is a red dot.

Interesting idea! Thanks for sharing :) I could definitely imagine adding some color options to choose from in the instrument settings where you can also set a name, etc.