结合上面的答案，您可以实现一些类似于gem colorize的东西，而不需要另一个依赖项。

class String
  # colorization
  def colorize(color_code)
    "\e[#{color_code}m#{self}\e[0m"
  end

  def red
    colorize(31)
  end

  def green
    colorize(32)
  end

  def yellow
    colorize(33)
  end

  def blue
    colorize(34)
  end

  def pink
    colorize(35)
  end

  def light_blue
    colorize(36)
  end
end

结合上面的答案，您可以实现一些类似于gem colorize的东西，而不需要另一个依赖项。

class String
  # colorization
  def colorize(color_code)
    "\e[#{color_code}m#{self}\e[0m"
  end

  def red
    colorize(31)
  end

  def green
    colorize(32)
  end

  def yellow
    colorize(33)
  end

  def blue
    colorize(34)
  end

  def pink
    colorize(35)
  end

  def light_blue
    colorize(36)
  end
end

以下是我不需要任何宝石就能让它工作的方法:

def red(mytext) ; "\e[31m#{mytext}\e[0m" ; end
puts red("hello world")

然后，只有引号中的文本是有颜色的，您将返回到定期安排的节目。

我发现了一些:

http://github.com/ssoroka/ansi/tree/master

例子:

puts ANSI.color(:red) { "hello there" }
puts ANSI.color(:green) + "Everything is green now" + ANSI.no_color

http://flori.github.com/term-ansicolor/

例子:

print red, bold, "red bold", reset, "\n"
print red(bold("red bold")), "\n"
print red { bold { "red bold" } }, "\n"

http://github.com/sickill/rainbow

例子:

puts "this is red".foreground(:red) + " and " + "this on yellow bg".background(:yellow) + " and " + "even bright underlined!".underline.bright

如果你在Windows上，你可能需要做一个“gem install win32console”来启用对颜色的支持。

另外，如果您需要创建自己的gem，为控制台Ruby-script输出着色这篇文章也很有用。它解释了如何向字符串添加ANSI着色。你可以用这个知识把它包装在一些类中，这些类扩展了字符串或其他东西。

着色是我最喜欢的宝石!: -)

看看吧:

https://github.com/fazibear/colorize

安装:

gem install colorize

用法:

require 'colorize'

puts "I am now red".red
puts "I am now blue".blue
puts "Testing".yellow

根据Erik Skoglund和其他人的回答，我写了一个小方法来测试基本的颜色模式。

#outputs color table to console, regular and bold modes
def colortable
  names = %w(black red green yellow blue pink cyan white default)
  fgcodes = (30..39).to_a - [38]

  s = ''
  reg  = "\e[%d;%dm%s\e[0m"
  bold = "\e[1;%d;%dm%s\e[0m"
  puts '                       color table with these background codes:'
  puts '          40       41       42       43       44       45       46       47       49'
  names.zip(fgcodes).each {|name,fg|
    s = "#{fg}"
    puts "%7s "%name + "#{reg}  #{bold}   "*9 % [fg,40,s,fg,40,s,  fg,41,s,fg,41,s,  fg,42,s,fg,42,s,  fg,43,s,fg,43,s,  
      fg,44,s,fg,44,s,  fg,45,s,fg,45,s,  fg,46,s,fg,46,s,  fg,47,s,fg,47,s,  fg,49,s,fg,49,s ]
  }
end

示例输出: