背景颜色

​基本用法

¥Basic usage

​设置背景颜色

¥Setting the background color

使用 bg-white、bg-indigo-500 和 bg-transparent 等工具来控制元素的背景颜色。

¥Use utilities like bg-white, bg-indigo-500 and bg-transparent to control the background color of an element.

<button class="bg-indigo-500 ...">
  Save changes
</button>

​改变透明度

¥Changing the opacity

使用颜色透明度修饰符来控制元素背景颜色的透明度。

¥Use the color opacity modifier to control the opacity of an element’s background color.

<button class="bg-sky-500/100 ..."></button>
<button class="bg-sky-500/75 ..."></button>
<button class="bg-sky-500/50 ..."></button>

你可以使用 透明度比例 中定义的任何值，或者如果你需要偏离你的设计令牌，则可以使用任意值。

¥You can use any value defined in your opacity scale, or use arbitrary values if you need to deviate from your design tokens.

<div class="bg-sky-500/[.06] ..."></div>

​有条件地应用

​悬停、聚焦和其他状态

Tailwind lets you conditionally apply utility classes in different states using variant modifiers. For example, use hover:bg-cyan-600 to only apply the bg-cyan-600 utility on hover.

<button class="bg-cyan-500 hover:bg-cyan-600 ...">Subscribe</button>

For a complete list of all available state modifiers, check out the Hover, Focus, & Other States documentation.

​断点和媒体查询

You can also use variant modifiers to target media queries like responsive breakpoints, dark mode, prefers-reduced-motion, and more. For example, use md:bg-green-500 to apply the bg-green-500 utility at only medium screen sizes and above.

<button class="bg-blue-500 md:bg-green-500 ...">Subscribe</button>

To learn more, check out the documentation on Responsive Design, Dark Mode and other media query modifiers.

​使用自定义值

¥Using custom values

​自定义主题

¥Customizing your theme

By default, Tailwind makes the entire default color palette available as background colors. You can customize your color palette by editing theme.colors or theme.extend.colors in your tailwind.config.js file.

module.exports = {
  theme: {
    extend: {
      colors: {
        'regal-blue': '#243c5a',
      },
    }
  }
}

Alternatively, you can customize just your background colors by editing theme.backgroundColor or theme.extend.backgroundColor in your tailwind.config.js file.

Learn more about customizing the default theme in the theme customization documentation.

​任意值

¥Arbitrary values

If you need to use a one-off color value that doesn’t make sense to include in your theme, use square brackets to generate a property on the fly using any arbitrary value.

<p class="bg-[#50d71e]">
  <!-- ... -->
</p>

Learn more about arbitrary value support in the arbitrary values documentation.