Moisten rim of chilled martini glass with lime wedge. Sprinkle sugar onto small plate, and dip moistened rim into the sugar to coat lightly.

First pour cranberry juice into the glass. Add ice.

Pour vodka slowly over the ice. Then pour Curacao and lime juice slowly over the ice so that the colours can be separate.
Enjoy the blend of bitter and sweet citrus.

I poured the blue Curacao last, very slowly. I found that this was the best way to keep the colours separated.