Workload vs Capacity Thresholds

No task assignment

No workload will be displayed when a resource is not assigned to any tasks. 

Task assignment exists

Standard

Custom 

BigPicture Enterprise feature → coloring rules can be defined only when using the BigPicture Enterprise add-on.

Levels and colors of the grid in the Resources module depend on Box type settings (Administration> Box type configuration > Resources > Coloring rules) and can't be adjusted for an individual Box.