Until the mid-1950s in most Western cultures, pink was seen as a bold and masculine color whereas blue was seen as a softer effeminate color. I've even heard the fact that Disney's depiction of Alice wears a blue dress is because of this.
That's an over-simplification and it varied quite a bit by context, as do most fashion trends and there's not anything akin to an "exact science".
(For example; in the Middle Ages, reddish colors were "feminine", but at the same time were considered "immodest" and associated with prostitution; I think blue, or at least a lighter blue, was considered more "demure"; for example Alice wears a very light, flowery shade of blue, not deep or "navy blue").
(In older eras, prior to the mass-clothing production we have today, more "exotic" dyes or colors were a sign of wealth or status, such as among noblemen; today, since almost anyone can buy a shirt of whatever color they want, I don't think that bold or "exotic" dies are considered as much of a status symbol).
As far as "nature" goes, pink is mostly associated with flowers (e.x. tulips).
So it's more complicated than simple axioms (e.x. here's a vintage woman's pink dress from the '40's).
Includes original belt. It looks like it is red and white checks in the photos, but it is a bright pink and white. Length: 44in.
www.ebay.com
