This code can be used to generate color themes from a base palette defined in the ColorPalette.json and using the configuration file you can modify base background color contextualize Leonardo when measuring the contrast, lightness and saturation of the palette.
To start run npm i and modify the ColorPalette.json file with the color palette you like to modify. Please keep in mind you must follow the token format of
Name_of_token:{value:"hex_or_rgb_value"}
Modify the Config.js to set up the values of the output of the new color theme. Once all is set and done run npm run build and it will generate a new new_theme.json and index.html to see the color output of the new colors.
You can then use that file to add it to your color token file as a new theme.
Example of Html file
Adobe leonardo helps power this tool. While definitely possible to just use their site it takes a bit longer when dealing with colors not originally generated by the tool. We built this tool to unlock creating themes with Leonardo without having to use the interface to generate a given palette. For more information though on Adobe Leonardo read their ReadMe.