For a long time, pink was mainly seen as a color for just girls—an irony considering that gender studies experts say that until the 1980s, it was often worn by men.

For the last nine years, Yoon has been photographing toddlers surrounded by their “favorite” colors–little girls, dressed in pink, blending in with a sea of pink Hello Kitty and princess ...

Pink is for boys and blue is for girls. That was the rule for dressing infants back in 1893, as one woman explained it that year to The New York Times. “Of course,” she said. “Why, if ...