When I married in 1973 I had a white wedding dress and my bouquet was red roses, white freesia, lily of the valley and greenery. I must confess My Mum wasn`t happy about my colour choice of flowers but I stuck by it.
As for the red and green should never be seen etc. A friend of mine married on Christmas Eve and she wanted Christmas colours everywhere. Some of her bridesmaids wore bright red satin dresses, some wore Christmas green satin dresses, her wedding dress was white but with red and green embroidery on the bodice and she wore a red velvet cape over the top of it. Her 6 tier cake was in the shape of Christmas presents stacked on top of each other, red and green again. She lives in America and had around 8 bridesmaids and the tables were decorated with Christmas trees, crackers and presents. I must say her red/green/white theme looked fantastic in the photos and really fitted in with the Christmas theme.