Home Web Front-end HTML Tutorial How to set opacity in html

How to set opacity in html

Sep 30, 2021 pm 06:58 PM
css html

Setting method: 1. Use the RGBA() function, the syntax "Attribute: RGBA (red value, green value, blue value, transparency value);"; 2. Use the opacity attribute, the syntax "opacity: transparency value;". The transparency value can be set from 0.0 (fully transparent) to 1.0 (fully opaque).

How to set opacity in html

The operating environment of this tutorial: Windows 7 system, CSS3&&HTML5 version, Dell G3 computer.

#How to set opacity in html?

Method 1

rgba() sets color transparency

Syntax:

rgba(R,G,B,A);
Copy after login

RGBA is the abbreviation for the three words Red (red) Green (green) Blue (blue) and Alpha (opacity). RGBA color values ​​are an extension of RGB color values ​​with an alpha channel - which specifies the opacity of the object.

Introduction to the values ​​in rgba():

R: red value. Positive integer (0~255)

G: green value. Positive integer (0~255)

B: Blue value. Positive integer (0~255)

A: Transparency. The value is between 0 and 1.

rgba() can simply set the color transparency, which has many applications in page layout. For example: make the background transparent, but the text above is opaque.

Code example:

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title>rgba()</title>
        <style>
            .demo{
                width: 350px;
                height: 300px;
                margin: 50px auto;
            }
            .demo *{
                width: 120px;
                height: 120px;
                margin: 10px;
                float: left;
            }
            .demo1{
                background:rgba(255,0,0,1);
            }
            .demo2{
                background:rgba(255,0,0,0.5);
            }
        </style>
    </head>
    <body>
        <div class="demo">
            <div class="demo1">背景色不透明,文字不透明!</div>
            <div class="demo2">背景色半透明,文字不透明!</div>
        </div>
    </body>
</html>
Copy after login

Rendering:

How to set opacity in html,

Method 2

opacity attribute setting background Transparency

Syntax:

opacity: value ;
Copy after login

value: Specify opacity, from 0.0 (fully transparent) to 1.0 (fully opaque).

opacityThe property is inherited and will make all elements in the container transparent;

Code example:

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title>opacity属性</title>
        <style>
            .demo{
                width: 280px;
                height: 140px;
                margin: 50px auto;
            }
            .demo1,.demo2{
                width: 120px;
                height: 120px;
                margin: 10px;
                float: left;
                background:#2DC4CB;
            }
            .demo1{
                opacity:1;
            }
            .demo2{
                opacity:0.5;
            }
        </style>
    </head>
    <body>
        <div class="demo">
            <div class="demo1">
                <p>背景色不透明,文字不透明!</p>
            </div>
            <div class="demo2">
                <p>背景色透明,文字也透明!</p>
            </div>
        </div>
    </body>
</html>
Copy after login

Rendering:

How to set opacity in html

opacity:0.5; Makes all elements of the demo2 container appear translucent.

Summary: Although both the rgba() method and the opacity method can achieve transparency effects, rgba() only acts on the color of the element or its background color (the child element of the element with rgb() transparency set will not inherit its transparency effect); and opacity is inheritance, which not only affects the element itself, but also makes all sub-elements within the element transparent.

Recommended learning: HTML video tutorial

The above is the detailed content of How to set opacity in html. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Repo: How To Revive Teammates
4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island Adventure: How To Get Giant Seeds
4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Table Border in HTML Table Border in HTML Sep 04, 2024 pm 04:49 PM

Guide to Table Border in HTML. Here we discuss multiple ways for defining table-border with examples of the Table Border in HTML.

Nested Table in HTML Nested Table in HTML Sep 04, 2024 pm 04:49 PM

This is a guide to Nested Table in HTML. Here we discuss how to create a table within the table along with the respective examples.

HTML margin-left HTML margin-left Sep 04, 2024 pm 04:48 PM

Guide to HTML margin-left. Here we discuss a brief overview on HTML margin-left and its Examples along with its Code Implementation.

HTML Table Layout HTML Table Layout Sep 04, 2024 pm 04:54 PM

Guide to HTML Table Layout. Here we discuss the Values of HTML Table Layout along with the examples and outputs n detail.

Moving Text in HTML Moving Text in HTML Sep 04, 2024 pm 04:45 PM

Guide to Moving Text in HTML. Here we discuss an introduction, how marquee tag work with syntax and examples to implement.

HTML Ordered List HTML Ordered List Sep 04, 2024 pm 04:43 PM

Guide to the HTML Ordered List. Here we also discuss introduction of HTML Ordered list and types along with their example respectively

How do you parse and process HTML/XML in PHP? How do you parse and process HTML/XML in PHP? Feb 07, 2025 am 11:57 AM

This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an

HTML onclick Button HTML onclick Button Sep 04, 2024 pm 04:49 PM

Guide to HTML onclick Button. Here we discuss their introduction, working, examples and onclick Event in various events respectively.

See all articles