As suggested by Edwin Huitema in https://forum.mendix.com/link/ideas/831 it would be useful to color microflows automatically.
Some partners use a color convention like this:
Better would be that you are able to configure your own convention based on activities and the modeller gives the activities the specified color.
But even better is that Mendix gives each activity a really easy to recognise icon and if necessary a supporting color.
All for it as long as it's configurable.
I hope it does not get to colorful because it can get distracting. But idea is OK.