Colors of Christmas (or should I say Yule?)

I walked to the park on Sunday to gather my greens for my Advent wreath (yes, I know I'm several weeks behind) and I was stopped in my tracks several times by the brilliant combination of red and green. No wonder these are the colors of the season.

It got me started thinking about how certain color combinations signify certain holidays. You can't really wear red and green without evoking Christmas. The same with orange and black which always screams Halloween.