The "IT" color schemes this year seem to be: Black, White &/or Silver; Neons- Pink, Teal(Blue), Green, &/or Purple; Brown, Red, & Gold Blue & White (with or without Silver)
One of these combinations or even just a single color would be perfect! The tree should reflect you & your families personality.
I'm no expert but I worked for a high end department store & assisted a decorator and this is what I learned.
Also, in regards to garland! FUN=GARLAND. FORMAL=NO GARLAND
We did one house that had the neon colors (Pink, Blue, Green & Purple) for the wreath w Blue lights. Fun & Funky! The "Formal Tree" in the main room with Red, Brown, Gold & Green with clear lights. To fill in some spots and give it a 3D effect we put some ornaments inside the tree close to the trunk not just on the ends! It gives it a little something extra!!
Hope you have a great time decorating your tree! I'm sure it'll be fabulous!
Pick a color theme. Mine is white gold and red. All the ornaments are those colors. The lights are clear or white. Pick ornaments that are going to match the size of the tree. I saw someone in the store pick lime green and teal.