ColorContrast

Calculate a contrasting color for a given hex code. Based on the YIQ method to calculate contrast.

Add this line to your application's Gemfile:

gem 'color_contrast'

And then execute:

$ bundle

Or install it yourself as:

$ gem install color_contrast

ColorContrast.get_contrast("#000000") # => "light"
ColorContrast.get_contrast("#0000ff") # => "light"

# hashtag is not needed for input
ColorContrast.get_contrast("00ff00") # => "dark"

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Bug reports and pull requests are welcome on GitHub at https://github.com/ronaldchacon/color_contrast.

The gem is available as open source under the terms of the MIT License.