Embroidery data generating device, computer-readable storage medium storing embroidery data processing program and sewing machine

An embroidery data generating device generates embroidery data usable to sew by a sewing machine an embroidery pattern composed of a plurality of color-based pattern portions. The device includes a color data storage unit storing data of a plurality of defined colors, an assignment unit randomly extracting a color from the color data stored on the color data storage unit, the extracted color being used as thread color data for specifying colors of the color-based pattern portions respectively, the assignment unit assigning the extracted colors to the respective color-based pattern portions and a sewing sequence data storage unit storing data of set sewing sequence of the color-based pattern portions. The device generates embroidery data in which an order of contrasting density of the colors assigned to the respective color-based pattern portions by the assignment unit as the thread color data corresponds to a sewing sequence of the color-based pattern portions.