UPC Barcodes – 4 different colors of the same product

I just purchased UPC barcodes through GS1 and now I am creating the Product Descriptions. I have a 4 pack of a product that contains 4 different colors. So does this 4 pack need 4 different UPC barcodes because of the 4 different colors or just 1 barcode and in the Product Description I name off the 4 different color variations?? Thanks in advance for your help guys!