Can I change the header on one page on the personal plan?

Site URL: https://lime-oleander-s6sf.squarespace.com/

Hi, 

First thanks for your continued help as I set up my site. Can I ask, is it possible to change my header background on different pages? From transparent to colour? 

During the trial I had custom code for this, but I now realise it's  premium feature. 

Thanks! 

Assume this is not possible? 😞