This plugin hasn’t been tested with the latest 3 major releases of WordPress. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress.

matriphe colorspam


Simple plugin to fight spam in registration form. It show color in box and user must type the name of color. The colors are red, green, blue, yellow, black, white, pink, orange, purple, grey.

Now using generated image to provide color. Bot can’t read this color name. Simple, nice and effective.


  • The register from after the plugin is activated.


  1. Install “matriphe colorspam” either via the plugin directory, or by uploading the files to your server
  2. Activate the plugin.
  3. That’s it. You’re ready to go!


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Contributors & Developers

“matriphe colorspam” is open source software. The following people have contributed to this plugin.


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Interested in development?

Browse the code, check out the SVN repository, or subscribe to the development log by RSS.



  • Using images instead of CSS. CSS color is breakable. Thanks to @mascang for posting bot in python to break the plugin here
  • Readd ORANGE and GREY from list
  • Using options database to store color options
  • Using session to tighten the security
  • Better register interface


  • Better security. Thanks to @linxlunx for posting bot in python to break the plugin here
  • Remove ORANGE and GREY from list


  • Initial plugin