Dec 2015 we had a case (Case # 904175) opened for VMAN Orion Integrated and there is no color indicator for Datastore Capacity thresholds.
I highly recommend this as a feature request in VMAN and Orion Integration.
To reproduce or check what this idea is --> Go to Online Orion Demo --> Virtualization --> Storage
If we see Top 10 Datastore by low free space resource notice there are datastores which have free space available < 10% but still they show as Green (or no indication at all)
As per SolarWinds support currently Data stores coloring indication is based on "status (online / offline)", High IOPS, High Latency [No indication based on capacity of Datastore]