The source of this code can be traced back to scss files.
In order to access the variables, you need to locate the _XXX.scss file. The SCSS compiler generates a global CSS file for the entire project, but when using developer tools, you will see the original _root.scss file instead of the compiled CSS.
To find the variables, look for the main CSS file in your project.
If you are familiar with scss and have access to all the scss files in the project directory, you can manually rebuild the global CSS stylesheet.
An alternative approach is to create a new CSS file that overrides specific definitions by placing it after the global CSS file. This method may not be the most efficient, but it allows for quick changes without affecting the entire project.