When the word self is used it means a solid color. No patterns can be found in the bird. 
self black  a solid black bird.
self white   a solid white bird 
self blue     a solid blue bird that has an even color of blue all over the bird. The bird does not have black edging or black lacing on the feathers.
blue    uneven blue color- males have a black or dark blue pyle region while females will have a black or dark blue head and hackle feathers, most have a pattern on each  
           feather of a black edge or a black lace., also called andalusian blue
Tim