But I'm still confused. I'm not a DT1, DT2 member and my name shows as clickable blue.
The blue ones are the people in your trust list. You're always in your own trust list so you will always see yourself as blue on the flags that you support or oppose. Other blue ones would be users in your custom trust list, or if you don't use that - it would be DT members.
Aside from the visual difference, the important part is that blue ones are the ones that count to make the flag active. You need
at least one more blue user on the support line than there are blue users on the opposition line to make a yellow flag active. You need
at least three more blue supports for a red flag to be active.
Grey ones are clickable too BTW.