The blue house in Larslejsstræde in central Copenhagen has almost become an attraction in its own right. Nearby Larsbjørnsstræde and Teglgårdstræde are also well-worth checking out for both the houses and the atmosphere.
#2 Sankt Hans Gade
Sankt Hans Gade is one of relatively few streets in Nørrebro that delivers on that pastel-coloured goodness. Tip: Nearby bars The Barking Dog or Nørrebro Bryghus are excellent choices for kicking off a night out in Nørrebro.
Extra special and extra crooked, this house on Sofiegade in Christianshavn is a must-see.
#4 Overgaden Oven Vandet
We're staying in Christianshavn for this one. When you're in the neighbourhood, do yourself the favour of climbing the tower of The Church of Our Savior.
The canals and nearby Christiansborg are worth it alone, but Nybrogade also sports an impressive colour palette of houses.
No further explanation needed, really.
Although it's located in the heart of Copenhagen, Gernersgade and the surrounding streets are quite tranquil, as they are mostly used for residential purposes. Nyboder is a stone's throw away and worth checking out, too.
By far Østerbro's most colourful street, there's also a really nice ice cream shop here.