CyberChrist
You caught my attention
While it is true that Norway was unified with Denmark for over 400 years (and later with Sweden for under 100 years) and didn't regain true independence before 1905 then Norway was never a colony.Iceland and Greenland (and Norway) were just Danish colonies.
Also, although Iceland was part of the Danish Kingdom until the onset of 2nd WW then it was actually settled by emmigrants coming from Norway and only came under Danish control when Norway unified with Denmark in 1397. Iceland was never considered a colony either.
Of the territories mentioned then only Greenland was ever a Colony.