Formatting Task Bars...
 

I'm running OmniPlan 2.1.2 on a Macbook pro...

I can't seem to figure out if this is something that isn't supported or if it's just something I don't know how to do:

--Can you format task bar "colors" with patterns?

Reason: I've got a multi year task with several groups that I would like to keep distinctly visually different and, I've run out of solid color "families".

Any help is appreciated!