I believe it was Karl Diebitsch and Walter Heck who designed the uniforms. Hugo Boss produced and delivered SS and othet Nazi uniforms. Correct me if I’m wrong. ..
Oh darn, you are right.
“Boss joined the Nazi Party in 1931, two years before Hitler came to power. By the third quarter of 1932, the all-black SS uniform (to replace the SA brown shirts) was designed by SS-Oberführer Prof. Karl Diebitsch and Walter Heck (graphic designer). Hugo Boss company produced these black uniforms along with the brown SA shirts and the black-and-brown uniforms of the Hitler Youth.”