Hello, I'm trying to configure settings which will show on the roadmap, issues by their set colour type and not inherit their epic colour which they sit in.

At the moment, I can change the epic colour and it will change all child linked issues colours to the same. This is irrelevant if the issue colour is set to something different.
I can change the epic colour by right-clicking and this will change all the issues underneath.

I can't change the issue colour by right-clicking on the schedule:

At a glance, I want to be able to group issues using colour. So the epic can be whatever colour, in this example purple. But I want the issue colours to show as yellow and keep the epic colour the same as it was.

Hope this makes sense! Can anyone help advise?
Thanks!