From Gateway Pundit:

Doug TenNapel Explains the T-Shirt Color-Coding System Used at the Maricopa County Forensic Audit

Yellow T-Shirts: Dealing with mail-in ballots, there are five tables for this group, ballots then moved to the green table

Green T-Shirts: Not exactly clear what ballots they are looking at

Blue T-Shirts tables: The group allegedly inspecting folds

Red T-Shirts: Not sure

Orange T-Shirts: Election observers

We will update this as we gain more information.

From Gateway Pundit:

Doug TenNapel Explains the T-Shirt Color-Coding System Used at the Maricopa County Forensic Audit

Yellow T-Shirts: Dealing with mail-in ballots, there are five tables for this group, ballots then moved to the green table Green T-Shirts: Not exactly clear what ballots they are looking at Blue T-Shirts tables: The group allegedly inspecting folds Red T-Shirts: Not sure Orange T-Shirts: Election observers

We will update this as we gain more information.