Can a lighting control system also control the light colour in addition to the brightness?

A light control can only ever control the brightness of the LEDs. The light colour of the individual LED bar or the respective channel of the lamp is fixed. Depending on the mixing of the individual LED bars/channels by the control unit, a different overall colour results.

Example:

LED SUNRISE 100% and LED AFRICAN-SUN 10% = a warm light

LED SUNRISE 50% and LED AFRICAN-SUN 50% = a neutral light

LED SUNRISE 10% and LED AFRICAN-SUN 100% = a cold light