You can generate a *.sldreg file using the CopySettingsWizard (this will basically grab the information from the registry on the computer, and save it in a handy file.)
It wasn't recommended to use the sldreg file when upgrading to a new major release - this may have changed.
The only way to get the old color scheme in 2016 will be to wait for Service Pack 3.0
(The .sldreg file will not do this, as these were pretty radical changes, not just settings.)
Hope this helps,