The Rate field specifies the rate of movement in steps per second. A step is a change in the device’s hue of one unit. If the MoveMode field is set to 1 (up) or 3 (down) and the Rate field has a value of zero, the command has no effect and a response command shall be sent in response, with the status code set to INVALID_COMMAND. If the MoveMode field is set to 0 (stop) the Rate field shall be ignored.
Input to the ColorControl moveHue command
See
MatterSpecification.v13.Cluster § 3.2.11.5