In 2017, Uruguay issued polyester 50-peso notes.
Unlike the previous notes, which were red, these 50th anniversary notes were blue.
And ugly in a brutal sort of way. Then in 2020, the polyester notes became red again.
There must be something about the 50-peso denomination that causes impishness. In 2011, they created a ridiculous and misleading 50-peso coin that nobody wants (an earlier blog post of mine).