Up until Inventor 2012 you could edit the registry and remove reflections from the shaded views of the drawing. Once it changed to Appearances you can't anymore.
You just needed to add a DWORD "Suppress Specular Color"=dword:00000001 in [HKEY_CURRENT_USER\Software\Autodesk\Inventor\RegistryVersionXX\Applets\DrawingLayout\Preferences\] and restart inventor. The XX is your inventor version; if you browse you’ll know which one to pick.
Just tried it in AIP 2015 and it's not working.