Abstract: An RGBI digital video control system for a color video monitor has first means for varying the level of received digital color video information, typically sixteen-color, four bit information, and second means for providing graduated RGB analog output signals in response to the varied input signals. An overall image strength control circuit varies the maximum intensity of the RGB output signals for a standard video processor. A second intensity control circuit, typically responsively coupled to the overall image strength control circuit, independently varies the intensity or brightness components for the RGB drive signals. Logic circuitry means produce non-standard colored shades to be interposed between the input signals and the graduation circuit. The logic circuit may be modified to produce desired non-standard shades in response to pre-selected input conditions.