These are literally everywhere except yellow star systems. Red green and blue stars have a good chance of having a "chromatic" planet with mega flora, greyscale color filter, and weirdly named weather. During a rainstorm (if you are lucky to have a chromatic planet with proper rainstorms) they greyscale effect go🧜eﷺs away.

These types of planets have been around for a 🐼very lo𒁏ng time.