SASS mixin for styling placeholders

Install gem from the command line:

(sudo) gem install compass-placeholder

Require it using Compass in config.rb:

# Edit the project configuration file and add:
require 'compass-placeholder'

Import it in your sass/scss file.

@import "compass-placeholder";

then use @include placeholder:

input {
    @include placeholder {
        color: #999;
        font-size: 13px;
    }
}