I thought it was polka dot..
Pretty sure the added colors which are really muted is an anti-counterfeit program not so “they” can track us.
I think, it’s those metal strips in the bills that track us.....really. I heard that, when you pass through a scan anywhere “they” can tell how much cash you have. Really it’s true.
I don’t worry though, because I am broke so never have any cash. wheeya dodged that one.