I’ve recently been toying with LocomotiveCMS as a WordPress replacement. While it doesn’t go the whole way to replacing all functionality in present in WordPress, it is a worthy (although slimmer) replacement if you prefer to stick with Rails and prefer all the other goodies that come along with running a Rails stack. It initially seems that you’ll need to fork[!] the project in order to implement any style changes for the admin area but digging through the source revealed this file:
Create a file with this path in your LocomotiveCMS engine project with the following contents:
locomotive-admin.css file exists within your LocomotiveCMS theme assets then this will be appended to the end of the
<head> tag in the admin area.