> For the complete documentation index, see [llms.txt](https://sugar-at.gitbook.io/blog-article/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://sugar-at.gitbook.io/blog-article/shell/5.md).

# 5. 输出彩色的内容

## 格式

echo -e "\033\[n1;n2;n3m字符串\033\[关闭属性"

* n1,n2,n3:为任意组合的数字
* 字体颜色范围:30-37
  * 30:黑色
  * 31:红色
  * 32:绿色
  * 33:黄色
  * 34:蓝色
  * 35:紫色
  * 36:天蓝色
  * 37:白色
* 背景色范围:40-47
  * 40:黑底
  * 41:红底
  * 42:绿底
  * 43:黄底
  * 44:蓝底
  * 45:紫底
  * 46:天蓝色低
  * 47:白底
* 特效范围:0,1,4,5
  * 0:无任何特效
  * 1:高亮(加粗)
  * 4:下划线
  * 5:闪烁

## 简单示例

```bash
# 红色字体
echo -e "\033[31m啦啦啦 \033[0m"

# 白底红字
echo -e "\033[47;31m白底红字内容 \033[0m"

# 白底红字下划线
echo -e "\033[4;31;47m测试内容 \033[0m"

# 下划线
echo -e "\033[4m下划线内容 \033[0m"
```

## 综合示例

模拟系统登入(带色),蓝底黄字输入用户名

```
read -p "`echo -e "\033[44;33m用户名: \033[0m"`"  username
read -p "密码:" -s password
echo "你输入的用户名$username"
echo "你输入的密码:$password"
```


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