I agree with the duck. Brown, orange, gold, dark red--the color of fall leaves and Thanksgiving food, like roasted turkey, pumpkin pie, cranberry sauce, stuffing, hot apple cider, etc. The colors for the months come from the natural colors of the season the month is in, and the colors for any associated holiday. So, Christmas is red and green, so that's part of the pallet for December. Spring is green, summer is green, warm colors, blue skies, bright colors. Fall is yellows and browns. Winter is cold colors like white and blue: