Can one wear a new tie during nine days since it is not really a beged or do we say anything used to enhance a look is a problem?
The Ohr Somayach website says the following:
While wearing new clothing that doesn’t require the blessing “sh’hecheyanu” is permitted until the 1st of Av, during the nine days it is prohibited even on Shabbat.
I think it is reasonable to classify a tie as clothing over which we do not make “sh’hecheyanu”.
Sefer Avnei Yashfei Chelek 1:217 holds that a tie is considered a beged and if has shatnez its a problem.
In Chelek 5:46:3 He writes that a tie is like a malbush in regards to having a Shabbas tie set aside.