It works like this: Insert your color cartridge into the Colorsonic, press the button and comb the device through your hair for instant results. Per L’Oreal, the gadget’s bristles “parts and ...

Ilon Specht in the 1960s art directing a test photo shoot. Her ad for L’Oréal’s Preference hair color product in 1973 became a hit. via Specht-Case family ...

Shay Mitchell Gets Roped into 'Cowboy Copper' Hair Trend — And Her Auburn Hue Cost Just $12 Celebrity hairstylist Dimitris Giannetos created the hair chameleon's latest look with a L'Oréal ...