Give the race of the blue-haired male superhero.
blue-haired refers to colour.colour = 'blue' WHERE hair_colour_id = colour.id; male refers to gender = 'male';
SELECT T3.race FROM superhero AS T1 INNER JOIN colour AS T2 ON T1.hair_colour_id = T2.id INNER JOIN race AS T3 ON T1.race_id = T3.id INNER JOIN gender AS T4 ON T1.gender_id = T4.id WHERE T2.colour = 'Blue' AND T4.gender = 'Male'