Description

disabling color features such as default pallette by theme.json lets their values still be output in DOM by WordPress as CSS variables

Step-by-step reproduction instructions

1.  "$schema": "https://schemas.wp.org/wp/6.0/theme.json",
    "version": 2,
    "settings": {
        "color": {
            "defaultPalette": false,
            "defaultGradients": false,
            "defaultDuotone": false
    }
    }
   

}```
2. see debugger

Screenshots, screen recording, code snippet

Environment info

WordPress 6.0.1

Please confirm that you have searched existing issues in the repo.

Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

Yes