This is Dactylorum Bicolor more commonly known as the rainbow grass hopper. Their colors are used to mimic other animals that use aposemetism in order to show predators they aren’t worth eating I.e brightly colored poison dart frogs. In the case of the grasshopper they are most
"The insect's coloration was shown to be aposematic in an experiment of predation by little striped whiptail lizards."
Scares away predators
en.wikipedia.org/wiki/Dactyl…