CSS file not being loaded


I am trying to load a css file, that i have created, but the file is not being loaded (I do not see any of the changes I made). I use the code below to import the file:

    dark: 'public/plugins/MyProjectsFolderName/css/MyFile.css'

I believe that i am giving a wrong path and MyFile cannot be found.
Is this the problem or is it something else that i have to do in order to load MyFile (any kind of configuration so that grafana can find it)? And if I am giving a wrong path, can you give an example of a right one?

Thank you in advance!