Source: https://tailwindcss.com/docs/opacity

v4.1

Effects
opacity

Effects

opacity

Utilities for controlling the opacity of an element.

| Class | Styles | | --- | --- | | opacity-<number> | opacity: <number>%; | | opacity-(<custom-property>) | opacity: var(<custom-property>); | | opacity-[<value>] | opacity: <value>; |

Examples

Basic example

Use opacity-<number> utilities like opacity-25 and opacity-100 to set the opacity of an element:

opacity-100

Button A

opacity-75

Button B

opacity-50

Button C

opacity-25

Button D

<button class="bg-indigo-500 opacity-100 ..."></button><button class="bg-indigo-500 opacity-75 ..."></button><button class="bg-indigo-500 opacity-50 ..."></button><button class="bg-indigo-500 opacity-25 ..."></button>

Applying conditionally

Prefix an opacity utility with a variant like disabled:* to only apply the utility in that state:

<input class="opacity-100 disabled:opacity-75 ..." type="text" />

Learn more about using variants in the variants documentation .

Using a custom value

Use the opacity-[<value>] syntax to set the opacity based on a completely custom value:

<button class="opacity-[.67] ...">  <!-- ... --></button>

For CSS variables, you can also use the opacity-(<custom-property>) syntax:

<button class="opacity-(--my-opacity) ...">  <!-- ... --></button>

This is just a shorthand for opacity-[var(<custom-property>)] that adds the var() function for you automatically.

Responsive design

Prefix an opacity utility with a breakpoint variant like md: to only apply the utility at medium screen sizes and above:

<button class="opacity-50 md:opacity-100 ...">  <!-- ... --></button>