Thanks Salvation. My wife will be relieved to know that white candles are acceptable for the Advent wreath. It's always a struggle finding good violet and pink tapers. 8-)
That was an interesting fact.
I always used the purple and pink (rose) during Advent and then from Christmas through Epiphany I put in white candles.
Other people leave the purple and pin (rose) and then put a white Christmastide Candle (I sometimes do it with a large pillar candle.) in the center of the Advent wreath.
There are probably many ways to do it. The important thing is the preparation mindset and the daily prayers.
They sell Advent candle sets, blue or purple, rose, in beeswax or stearin, and holders/wreaths.