What is the charge of gluons?

Gluons are the force carriers of the strong interaction in quantum chromodynamics and are unique in that they carry a type of charge known as "color charge." There are three types of color charge: red, green, and blue, and each gluon can carry a combination of these charges. Unlike other gauge bosons, such as photons, gluons also interact with each other because they carry color charge, which contributes to the complexity of the strong force. Overall, gluons are essential for binding quarks together within protons, neutrons, and other hadrons.