Conditional format in gantt charts

Hello,

I'm using one of the pre-existing simple gantt chart templates on excel and I'm trying to alter the conditional formatting rules based on the resources.
I.e I want to be able to select crew 1 or crew 2 in column B (assigned to) (will need about 20 in total, but I can generate a list from data validation) and for it to then colour code the progress bars on the gantt chart according to which crew I've picked.

So if I select crew 1, the duration bars will turn red, crew 2 the bars will turn blue etc etc.

Regards,

Alex