Forbes contributors publish independent expert analyses and insights. I write about retail and the forces that are redefining shopping. L'Oréal's Colorsonic, left, and its components at right, ...

At CES, L’Oréal is showing off its first hair color device that can be used at home. The handheld Colorsonic can mix and apply product evenly, according to the company. If it works as promised, ...

Coloring hair at home comes with plenty of struggles. First, there’s the task of playing cosmetic chemist and mixing the color, worrying that if you don’t blend the formula just right it might look ...