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Terminal color capabilities detection.

TTY::Color provides independent color support detection component for TTY toolkit.


Add this line to your application's Gemfile:

gem "tty-color"

And then execute:

$ bundle

Or install it yourself as:

$ gem install tty-color


TTY::Color allows you to check if terminal supports color:

TTY::Color.color?    # => true  # => true

You can also get the number of colors supported by the terminal using mode method:

TTY::Color.mode # => 64

To detect if color support has been disabled with NO_COLOR environment variable, use disabled?:

TTY::Color.disabled? # => false

TTY::Color is just a module hence you can include it into your scripts directly:

#!/usr/bin/env ruby

include TTY::Color

puts color?

Command line tool

tty-color-cli is a command line tool for the TTY::Color.

To check if terminal supports colors use -s|--support:

tty-color -s
tty-color --support
# => true

And to check color mode use -m|--mode option:

tty-color -m
tty-color --mode
# => 256


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


Bug reports and pull requests are welcome on GitHub at This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

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

Code of Conduct

Everyone interacting in the TTY::Color project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.

Copyright (c) 2016 Piotr Murach. See LICENSE for further details.