Blonde highlights for gray hair - here's a good idea to camouflage gray hair with blonde/gray-ish highlights. Upkeep would be easier if the highlights are more "grey" than blonde so not as noticeable when roots grow out.
Strawberry blonde highlights!
Neutral pale blonde highlights and lowlights by suzette
Really Pretty Hair Combo Color. I have my hair stylist do the same coloring. Top half is all blond highlight, deep bright red, and a dark dark brown. I have her then use the same really dark brown underneath and then layer.