A slightly more risqué hair trend for fall is to add either a touch of blue, in the form of colour highlights/lowlights, ombre, or a peek-a-boo, or a rich, full head colour. Some such hues include a deep navy, turquoise (see below), indigo, or frosty gray-blue (see above). Deep ash mixed with faded blue is another beautiful option for this wintery look. For the wilder at heart, a more vibrant option. Blue also suits a variety of hairstyles and lengths.