How do you change the banner color on one page only?

Site URL: https://Santisuk.Squarespace.com

I want to change the banner color on one page only.

How do I do that?

30 minutes ago, IanBanker said:

Site URL: https://Santisuk.Squarespace.com

I want to change the banner color on one page only.

How do I do that?

The code for a specific page (adds to one page only). Pages -> Gear Icon next to the page -> Advanced, put this

<style>
	#header {
      background-color: green !important;
    }
</style>

Thank you so much! We really appreciate this.