there are many, many many different tribes of Poles including Mazurians, Polans, Silesians, Warmiaks, Pomeranians, Kashubians, Slovincians, Kociewiacy, Borowiacy, Bieżuńczanie, Bobrzanie and many, many others. I'm the first non-100% Polish member on my mom's side of the family wherein everyone has blue or brown eyes (mom-blue, aunt-blue, grandpa-blue, grandma-blue), though my great grandfather had hazel eyes with an orange band around the center. He said that some Poles from Krakow have this orange band and that while it's not only limited to the Polish, it's far more common in a tribe of Poles decent from the Krakow region.
Similarly, post WWI, there are 3 major groups of Poles living in Poland: The blonde-haired, blue-eyed members of the nothern areas where the majority of the population was of German decent (Prussian decent, to be more accurate); the predominately more Russian Poles who usually occupied the eastern parts of Poland that bordered Russia, as well as the southeastern-most parts of the country and lastly, the Poles of Austrian decent, which I am. My neighbor, 7 years ago was named Nowakowski and he was a Russian Pole with dark hazel eyes and "mousey" brown hair. He, his father and his mother had the same hair and dark hazel eyes while his brother had brown hair and dark, almost purple, blue eyes.
I've met some Poles with blonde hair and blue eyes, but they usually have English or German parents as well so I'm really not sure what the ratio is between non-Germanic Poles and b-hair/b-eyes