Highlight Gray Hair
Q: If someone wanted to highlight gray hair (silver and dark) what would you suggest? She does not want to color her whole head.A: This is a tough one. Most women and men who are going gray are looking either to cover the gray or think of the gray hair as a highlighting already.
Using the still-pigmented hair, you need to find the base color for the natural hair color. Once that is done, you can select a "highlight color" that will compliment that color. For example, if the non-gray hair is a dark auburn brown, then using a light auburn, or dark strawberry blonde would make a good highlight color, adding depth without trying to over-lighten the hair.
If the individual has a lot of gray (more than 50% coverage), you might want to use this technique to "lowlight" the hair and give partial gray coverage. By choosing a complimentary color (based on the natural color of the pigmented hair) you can blend the transition from pigmented to gray and give a more youthful appearance.
©Hairfinder.com
See also:
How to color hair
How to choose natural-looking highlights
Hair tips for looking younger