Gantt Chart – conditional formatting?

Hi all, just started working with the Gantt Chart visual and wondering if it possible to

a) Colour the bar based on a value (such as activity status)

b) Colour the Display Categories and Display Measures based on their values (such as to make a traffic light, similar to what you can do with the out of the box PowerBI table visual)

Thanks!

PS, is there a user guide for the visual – I may have missed that in searching!