Amy put a blue ribbon on the boy and a pink on the girl, French fashion, so you can always tell…
– Little Women, Louisa M. Alcott
So clothing colour for children wasn’t commonly gendered the 1860s. In fact, for a long time, babies of either gender simply wore white, like in the William Quiller Orchardson painting below.
And Renoir painted his son, Coco, in both pink and blue.