In my post "Female Aurochs remastered" I revised my previous reconstruction of the Sassenberg specimen, which I now believe was too slender and lanky. The new result looks more credible and natural to me. I did the new reconstruction in a dark chestnut brown coat colour like that of many Maronesa and Heck cows, which also appreciates Schneeberger's description from the 16th century.
Now I did this cow in two other aurochs cow colours. One of them being the shiny orange-red at the trunk that gets darker towards neck, head and legs, and the other one is simply a black bull colour - we know that such cows existed.