There are some people who may refer to the colors of the rainbow as ROYGBIV this stands for the usual format of rainbows when they are seen namely, red, as the shortest wavelength followed by orange, yellow, green, blue, violet, and indigo. Some people are more familiar with the colors of the rainbow as VIBGYOR meaning violet, indigo, blue, green, yellow, orange, and red.
Knowing the colors of the rainbow can be fun for a lot of kids and even for some adults who have already forgotten what the acronyms mean because they are too busy doing other things. These seven colors are the most used colors right now.