My Aunt used to have her tree color coordinated one year all the ornaments were blue and silver, next year they were burgundy and hunter green, she stuck to the correct shades too! Every year the colors were different. And the whole house matched! my Uncle was a career navy Officer so Decorating was her enjoyment. I took care of her before she passed away and she told me to go to town! Decorate how ever I saw fit! I had a hard time breaking away from her style in her home, so we just did a tree with Silver and gold and iridescent.
The sweet part of the way she decorated was she would always give the decorations to the local Thrift store to raise money for foster kids Christmas presents. That style looks pretty but my favorite Christmas trees will always be Green with a modge-podge selection of hand made ornaments.