Rainbow xp.zip is a release file of the Minecraft resource pack Rainbow enchantments and xp!, made for Minecraft 1.17.1, 1.17. It was published on July 20, 2021 and is 0.1 MB in size. For the full description, screenshots and every other version, visit the Rainbow enchantments and xp! resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.