
It depends on the exact view, but red always means overutilized even if the number is below 100%. For example, if a resource is overloaded versus their max capacity on a specific project that cell will be red (ex. resource has max capacity of 50% on that project, they are at 60%). Moreover, the red will roll all the way up. So if that is the user's only project, their overall load will show as 60% and red because of the overcapacity on that one specific project.