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Compass rails is an adapter for the Compass Stylesheet Authoring Framework for Ruby on Rails.

Since Compass v0.12.0, this is the only way to use compass with your rails application.

Supports Rails 5.2 and 6.x releases.


Add the compass-rails gem line to your application's Gemfile

gem 'sass-rails'
gem 'compass-rails'

If you are using any Compass extensions, add them to this group in your Gemfile.

And then execute:

$ bundle


Change your application.css to application.css.scss or application.css.sass and then @import compass and your own stylesheets to your hearts content. E.g.:

@import "compass";

@import "your_project/mixins";
@import "your_project/base";


Use application.css to require files that use compass features. Ex:

 *= require styleguide_full_of_compass_stuff

Don't use *= require something within your SCSS or SASS files. You're gonna have a bad time.


Compass-rails is configured out of the box to work with Rails.

Advanced users can choose to add a config/compass.rb and take advantage of the Compass configuration reference as is.

Installing Compass extensions

Step 1: Add it to your Gemfile and run the bundle command to install it.

Step 2: Install the extension's assets: bundle exec compass install <extension/template>

For example, if you want to use susy.

# Gemfile
gem 'compass-rails'
gem 'susy'

then run:

$ bundle
$ bundle exec compass install susy

if you are using the rails configuration files you should add:

config.compass.require "susy"

to your application.rb configuration file.


  1. Fork it
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Added some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Create new Pull Request