Advent wreath: A circle of evergreen branches decorated with four candles that represent the weeks of Advent. Three candles are purple and one is pink. Each Sunday of Advent an additional candle is lit and prayers are said.
In some regions the third candle on the advent wreath is pink, reflecting the liturgical colours of “Gaudete” Sunday, when the priest can wear rose -coloured vestments. Description from ordinariateexpats.wordpress.com. I searched for this on bing.com/images