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

我发现前面的答案很有用。但是，如果我想在不使用任何第三方库的情况下对日志输出等内容进行着色，那么它们就不适合。下面的方法帮我解决了这个问题:

red = 31
green = 32
blue = 34

def color (color=blue)
  printf "\033[#{color}m";
  yield
  printf "\033[0m"
end

color { puts "this is blue" }
color(red) { logger.info "and this is red" }

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

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。

您可以在控制台中使用ANSI转义序列来完成此操作。我知道这适用于Linux和Mac OS X，但我不确定Windows控制台(cmd)是否支持ANSI。

我是用Java写的，但思想是一样的。

// Foreground color
public static final String BLACK_TEXT()   { return "\033[30m";}
public static final String RED_TEXT()     { return "\033[31m";}
public static final String GREEN_TEXT()   { return "\033[32m";}
public static final String BROWN_TEXT()   { return "\033[33m";}
public static final String BLUE_TEXT()    { return "\033[34m";}
public static final String MAGENTA_TEXT() { return "\033[35m";}
public static final String CYAN_TEXT()    { return "\033[36m";}
public static final String GRAY_TEXT()    { return "\033[37m";}

// Background color
public static final String BLACK_BACK()   { return "\033[40m";}
public static final String RED_BACK()     { return "\033[41m";}
public static final String GREEN_BACK()   { return "\033[42m";}
public static final String BROWN_BACK()   { return "\033[43m";}
public static final String BLUE_BACK()    { return "\033[44m";}
public static final String MAGENTA_BACK() { return "\033[45m";}
public static final String CYAN_BACK()    { return "\033[46m";}
public static final String WHITE_BACK()   { return "\033[47m";}

// ANSI control characters
public static final String RESET_COLORS() { return "\033[0m";}
public static final String BOLD_ON()      { return "\033[1m";}
public static final String BLINK_ON()     { return "\033[5m";}
public static final String REVERSE_ON()   { return "\033[7m";}
public static final String BOLD_OFF()     { return "\033[22m";}
public static final String BLINK_OFF()    { return "\033[25m";}
public static final String REVERSE_OFF()  { return "\033[27m";}