Changing the color on just one page is possible using a couple of CSS rules. Go to your one page, click the Settings button, then go to the Advanced tab. Enter the following into the Page Header Code Injection field:
<style>
body {background-color: pink;}
#canvas {background-color: pink;}
</style>
The first rule changes the entire page body. The content area has its own color setting though, so you must change that one separately. I’ve tried these rules on the demo site’s Read Me page, and they seem to do what you are after.
Possibly you might need to add !important after the color names, as in “…:pink !important;”. Try the above first. Add the !important if you need it.
It would be to your advantage to learn enough about CSS to personally understand what the above rules mean and how they work. That’s a shameless plug for my book, but it’s true too.
Jonathan Gennick, Author: Learn CSS for Squarespace
I used to use the following for my events page:
<style>
#banner-area-wrapper {display: none}
</style>
In my case, I went to Events Settings, the Advanced tab, and I placed the above code into the Page Header Code Injection field.
I just tested this solution quickly. It still works.