You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: color.rb
    path of file: ./repos/gosu/lib/gosu
    
    the code of the file until where you have to start completion: module Gosu
  class Color
    include Comparab
    
    def <=>(other)
      if other.is_a? Color
        to_i <=> other.to_i
      elsif other.is_a? Numeric
        to_i <=> other
      else
        nil
      end