Calling Obama black is an insult to his mother?

he is black and it is not an insult to his mother i am white you wouldnt call me a light white or a medium white too much detail this term is used for identifying i think like hair color you say gray not gray with a little brown keep it simple and i am not racist if he wants to explain his heritiage every time he appears on stage he can but i dont think its matters that much to him or to others