I would like to change some properties of the frontend of a dashboard.
EXAMPLE: In this case, I would like to change the color of the border. Pass from this:
To this (put the color border of a widget -or all widgets in the dashboard- in green):
I believe that I could do that including new variables in developer dashboard settings. Example of where create variables:
Is it possible?
If it is, how could I do it? Does exist documentation about it?
If it is not possible in this way, is there another way?