Failing to Load custom colors under Windows

[steven-pribilinskiy]

either specifying direct path or relative or even putting the file in the root drive leads to an error, e.g.
"color_scheme": "FindResults.hidden-tmTheme"
"color_scheme": "Packages\\User\\FindResults.hidden-tmTheme"
"color_scheme": "C:\\FindResults.hidden-tmTheme"
"color_scheme": "C:\\Users\\Administrator\\AppData\\Roaming\\Sublime Text 3\\Packages\\User\\FindResults.hidden-tmTheme"

the error:
Error loading colour scheme Packages\User\FindResults.hidden-tmTheme: Unable to open Packages\User\FindResults.hidden-tmTheme

Also getting this on OSX.