People may say that blondes have more fun, but brunettes and redheads know that’s not true: When it comes to low-maintenance but luxurious hues, dark brown hair color reigns supreme.

Instead, these are hair dyes uniquely formulated for graying and meant to return you to your previously natural color.

Eileen Carey is a successful CEO, in her early 30s, with glasses and brown hair. But she didn't always look the way she does now. "The first time I dyed my hair was actually due to advice I was ...