ID list of Theme Color in Squarespace.
LIGHTEST 1
[data-section-theme="white"]
LIGHTEST 2
[data-section-theme="white-bold"]
LIGHT 1
[data-section-theme="light"]
LIGHT 2
[data-section-theme="light-bold"]
BRIGHT 1
[data-section-theme="bright-inverse"]
BRIGHT 2
[data-section-theme="bright"]
DARK 1
[data-section-theme="dark"]
DARK 2
[data-section-theme="dark-bold"]
DARKEST 1
[data-section-theme="black"]
DARKEST 2
[data-section-theme="black-bold"]