There's lots of ways in which the colours can go, we design an art style guide before we begin. The whole team contributes to this, we find reference images we like and then have long discussions on Slack and on calls to finalise the look that we are going for.
All this up front exploration then makes it that much easier to get the pages coloured.
I hope you found this making of panels interesting, remember share with me what you want to see in these on the Google form here - https://forms.gle/u2faW8dUe1UWcbGH7
