Filter by tag color

I group my tags by domains.  

For example:
Community: #acsd #lions #rotary are all blue to denote they are #community domain
Personal: #self, #family, #friends are all yellow to denote they are #personal domain
Career: #dwr, #first are all green to denote #career domain

I tag all projects/tasks by their domain and add dates.  It would be wonderful to be able to filter by tag color so that I can easily focus/find similar domain items