Colorkit

A set of utilities to help with dealing with RGB colors. Supporting

• colorspace conversion from RGB to XYZ or CIE lab*
• determining distance between two colors using CIE76
• storing RGB colors as integers

http://en.wikipedia.org/wiki/CIE_1931_color_space http://en.wikipedia.org/wiki/Color_difference#CIE76

Add this line to your application's Gemfile:

gem 'color-rgb'

And then execute:

$ bundle

Or install it yourself as:

$ gem install color-rgb

then

require 'color-rgb'

To instantiate an RGB color

Color::RGB.new(r, g, b)          # r, g, b arguments
Color::RGB.from_array([r, g, b]) # an array of RGB values
Color::RGB.from_int(rgb_int)     # int

To convert to XYZ or CIE Lab*

color_rgb = Color::RGB.new(r, g, b)
color_rgb.to_xyz
color_rgb.to_lab

Or to convert to an int for storage

color_rgb = Color::RGB.new(r, g, b)
color_rgb.to_int

Or to go from an Color::RGB instance back to an array of r,g,b values

color_rgb.to_a

To determine distance / similarity between two RGB colors

rgb_one = Color::RGB.new(r, g, b)
rgb_two = Color::RGB.new(other_r, other_g, other_b)

Color::Comparison.distance(rgb_one, rgb_two)

If you are planning to compare rgb_one against a number of colors in sequence tou can instantiate a comparitor object and call compare with any other RGB

rgb_one = Color::RGB.new(r, g, b)

comparitor = Color::Comparison.new(rgb_one)
comparitor.compare(some_other_rgb_color) # Color::RGB isntance
comparitor.compare([r, g, b]) # array of RGB values

1. Fork it ( https://github.com/apartmenttherapy/color-rgb/fork )
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