How override default admin static files?
The django package is hosted on your server. Have you considered changing the images for icon_error.png and icon_success.png, then resaving them with the same name on your filesystem?
The location where you can find the static image files within the django package is: 
/ django / django / contrib / admin / static / admin / img /
How can I override default admin static files - for example icon_error.png, icon_success.png ?