MTS/TBERD IPTV summary colors

What do the different colors means on the MTS-TBERD IPTV Summary Status views?

There are five colors that can shade the MTS/TBERD IPTV Summary category windows: Green, Yellow, Red, Light Grey and Dark Grey.  Green indicates that all results are ok for the summary group. Yellow indicates that at least one result, at that summary layer, has triggered a minor alarm or error based on the established thresholds. Red indicates that at least one result has triggered a major alarm or error based on the established thresholds. Light grey indicates that results are not available because there is an issue at a lower level that prevents the unit from determining status for that summary group. Dark Grey indicates that the unit cannot detect signal, packets or streams required to provide the status for that summary group.