I send a sketch of the great supernova in the galaxy M.82.
I could not detect any color in this SN, it looked white to me!
I also observed the SN in M.81 in 1993 (ASOD-gallery).
My sketch here is made with colorcrayons on black paper.
Location: Trondheim, Norway. Info on my sketch.
Best wishes from Per-Jonny Bremseth.