I haven't watch Song Dynasty's detectives before, but by looking at it I think the colour is quite alright, since Song dynasty favour red colour in general. The only thing I have to complain about Chinese dramas that was We Chinese hardly pay attention to our traditional clothing, we made up a lots of fake Chinese clothes in our movies and dramas. By comparing with Korea and Japan, we are so lag behind where they valued their traditional clothing much more than us. Especially the male counterpart of Ming clothing, the Korean only wore our clothing but today more people views the clothing is originally from Korea other than us, which is very sad.