Multi-needle sewing machine and computer-readable storage medium storing embroidery data processing program

A non-transitory computer-readable storage medium which is configured to be installed in a multi-needle sewing machine including a spool setting portion on which a plurality of thread spools are set and a thread spool color storage unit storing thread colors of a plurality of thread spools set on the spool setting portion, the medium storing an embroidery data processing program used to generate embroidery data for sewing an embroidery pattern composed of a plurality of pattern-by-color portions by the multi-thread sewing machine, the medium comprising:

• a thread spool color storage routine of storing, on the thread spool color storage unit, the thread colors of the thread spools set on the spool setting portion as thread spool color data;
• an input routine of receiving a user input to receive one or more user's designations of thread color data of one or more pattern-by-color portions;
• an assignment routine of assigning thread color data to each pattern-by-color portion by:
• determining, for each pattern-by-color portion, whether or not the user's designation of the pattern-by-color portion has been received;
• when the user's designation for the pattern-by-color portion has been received, then the user's designation is assigned as thread color data for the pattern-by-color portion;
• and
• if the user's designation for the pattern-by-color portion has not been received, then randomly extract and assign a non-overlapping color as thread color data for the pattern-by-color portion from the data of the plurality of thread colors stored in the spool color storage unit.