In Japanese, we use the expression 黄色い声援, "*(let out) a **yellow** cheer*" to describe a collective ecstatic exclamation that extremely enthusiastic female fans utter at the sight of a famous actor or the performance of their favourite band.

This expression is confined to denoting ***females*** who, fangirling over their idol, burst out cheering and screaming wildly. Your guess is as good as mine, though, as to why we use the colour *yellow*. 

An audience letting out a yellow cheer, 黄色い声援:

https://youtu.be/jrFxZVViA_I?t=463