If there's an option for this I can't find it. I don't want the addon to tell me anything about threat if I am DPS, just to show me the default in combat nameplate color. The best option I could find was just to set all 3 threat values to a similar color as the default hostile/in combat color.

I could just turn off threat colors, but it would be great if there was an option to only turn off threat colors for non tank specs. I want to just use 1 profile for all alts/specs so with how TP current works, it seems I would need to manually enable/disable the threat system entirely every time I want to toggle it.

There is no direct option, but you can create two profiles, one for tank, one for dps (you can configure it that it swithces automatically - not in Classic though) and then, in the dps profile, disable threat coloring. Would that work?

Main reason I do not like that option is then any changes made to one profile also need to be applied to the other. For the time being I just set all my DPS specs to use red for threat plate colouring.