FAQ: What do the red and green bands mean to the right of the patron listings?

Question:  What do the red and green bands to the left of an item listing mean?

Answer:  See screenshot below of listings on a phone.  The red means the patron bid earlier, but has now been outbid.  The green means the patron is the winning bidder (or has purchased a multi-sale item.  If there is no colour, then the patron has never bid or purchased the item.