You absolutely should trust wikipedia unless you can provide some evidence to the contrary; in fact, the linked article even has a whole section to support your doubt about the claim*('s veracity), which was interesting to read!

From: https://en.wikipedia.org/wiki/Gendered_associations_of_pink_...

> In a 2017 letter to Archives of Sexual Behavior, researcher Marco Del Giudice commented on earlier claims about a supposed shift in pink–blue color associations or preferences sometime around the 1940s, from pink for boys and blue for girls before that period, to the opposite alignment afterward. He summarized his earlier work from 2012 which found "no evidence of either reversed or inconsistent usage prior to the 1940s".[41] Del Giudice called this theory the "Pink–blue reversal" (PBR), and said it was "usually attributed to [Jo] Paoletti", and quoted from five academic articles that reprised the theory of "pink is for boys" prior to the 1940s. However, he found upon analysis that it was exceptionally difficult to actually document such a shift, and exclaimed upon "the thinness of the evidence presented in support of the PBR".[42]

> In his 2012 paper, Del Giudice quoted from four articles published in academic journals which all echoed the claims about PBR theory, many relying on Paoletti, including Chiu et al., 2006: "Prior to that decade, Paoletti ... noted that the sex-dimorphic color coding of pink and blue was inverted, i.e., infant boys were dressed in pink and infant girls were dressed in blue";[43] Frassanito & Pettorini (2008): "At one point, pink was considered more of a boy's color ... blue was considered more for girls";[44] Cohen (2013): "the current stereotypical American assignment of pink to girls and blue to boys was reversed a century ago";[45] and Zucker (2005): "Yet, in the first two decades of the twentieth century, there is evidence that the gender-dimorphic nature of these two colors was inverted, that is, blue was judged to be stereotypically feminine whereas pink was judged to be stereotypically masculine."[46][47] But Paoletti never made the claim that pink and blue reversed, only that there was inconsistent usage that took until the 1950s to resolve[42] starting from the first appearances of gendered pink and blue color associations around the 1860s.[7]

tl;dr - gender is very clearly a social construct and we shouldn't get hung up on colors or names

- edited for clarity