1. A display system for a data processing system comprising: a video display unit for displaying discrete color levels at individual pixels; a lookup table (LUT) memory responsive to sequential multibit addresses received at an address input thereof for providing sequential multibit color data outputs to the video display unit to define the color at each pixel, the LUT memory further having a data input for receiving color data to be stored at the LUT memory addresses during an initialization procedure; a display memory having stored therein lookup table addresses for each pixel of a frame of pixels to be displayed by the display unit; a display data path from the display memory to the address input to the LUT memory; and lookup table initialization control means for directing color data from the display memory on the display data path to the data input of the LUT memory during initialization of the LUT memory.