Quarks also have color charge and react via the weak force. For baryons, each quark is green, red or blue. One can be one color at one time. For mesons, the quark is red, green or blue and the antiquark is antired (cyan), antiblue (yellow) or antigreen (pink). Quarks can change color by emitting a W boson. For example, if a green color-chrged quark emits an red-antigreen W boson to a red quark, the green quark will become red and the red quark will become green. Therefore, W bosons along with Z bosons (which mediate the weak force for neutrinos) help particles react via the weak interaction.