The multislice is a generalization of the slice to several colors.
We prove a Friedgut–Kalai–Naor theorem for balanced multislices. Our proof is inductive, and uses as a base case our Friedgut–Kalai–Naor theorem for balanced slices.
As an application, we prove stability versions of the edge-isoperimetric inequality for the multislices for settings of parameters in which the optimal set depends on a single coordinate.