search
HomeWeb Front-endHTML TutorialWeb前端新人笔记之CSS值和单位_html/css_WEB-ITnose

数字

颜色——命名颜色

在Css2.1中规范定义了17个颜色名。包括html4.0中定义的16个颜色及外加一个橙色;

<h1 id="aqua">aqua</h1><h1 id="fuchsia">fuchsia</h1><h1 id="lime">lime</h1><h1 id="olive">olive</h1><h1 id="red">red</h1><h1 id="white">white</h1><h1 id="black">black</h1><h1 id="gray">gray</h1><h1 id="maroon">maroon</h1><h1 id="orange">orange</h1><h1 id="silver">silver</h1><h1 id="yellow">yellow</h1><h1 id="blue">blue</h1><h1 id="green">green</h1><h1 id="navy">navy</h1><h1 id="pruple">pruple</h1><h1 id="teal">teal</h1>

当然网页上不只有这些颜色组成。Web浏览器能识别多达140多个颜色名。包括上面我们提到的。具体就不介绍了;

颜色——RGB颜色

计算机通过组合不同的红色、绿色、蓝色创建新的颜色,这种组合成为RGB颜色;

使用百分数记法指定白色和黑色: rgb(100%,100%,100%); rgb(0%,0%,0%);使用整数三元组记法: rgb(255,255,255); rgb(0,0,0);

如果当用户输入的值为小数且值是在可取范围之内的。都会以"四舍五入"的方式精确到最接近范围的边界。如果一个值大于100%或者小于0%。都会被默认的调整回到100%或者0%;

p spanOne{color:rgb(300%,1230%,110%);}/*100%,100%,100%*/p spanTwo{color:rgb(0%,-780%,-34535%);}/*0%,0%,0%*/p spanThree{color:rgb(13,35,656);}/*13,35,255*/

 

颜色——16进制RGB颜色

工作原理:将三个介于00~FF的16进制数连起来。就能设置一种颜色。记法的一般语法是#AABBCC。且三个数之间没有空格、逗号及其他分隔符。

h1{color:rgb(255,255,255) ;} 等价于 h1{color:#FFFFFF ;}而h1{colol:reb(51,102,58);}    等价于 h1{color:#336680}

颜色——等忦颜色表

 颜色——Web安全色

0%或者0是一个安全值。如果使用RGB百分数,要让所有的3个值都要么是0%或者是一个能被20整除的数eg: rgb(40%,100%,80%);如果使用0~255范围的RGB值那么所有的3个值都要么是0或者是一个能被51整除的数eg: rgb(0,204,153);

长度单位

英寸(in)、厘米(cm) 、毫米(mm)、点(pt)、派卡(pica);

长度单位——相对长度单位

相对长度单位共有3种:em、ex和px
 
ps:<br />本章内容只是自己根据阅读CSS权威指南做出的一点小知识积累。可能不太详细,如若有大神阅读本文章尽量对我的文章做出点评。让我知道还有哪些不足之处加以改正

 

 

Statement
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
What is the purpose of HTML attributes?What is the purpose of HTML attributes?May 07, 2025 am 12:01 AM

HTMLattributesareessentialforenhancingwebelements'functionalityandappearance.Theyaddinformationtodefinebehavior,appearance,andinteraction,makingwebsitesinteractive,responsive,andvisuallyappealing.Attributeslikesrc,href,class,type,anddisabledtransform

How do you create a list in HTML?How do you create a list in HTML?May 06, 2025 am 12:01 AM

TocreatealistinHTML,useforunorderedlistsandfororderedlists:1)Forunorderedlists,wrapitemsinanduseforeachitem,renderingasabulletedlist.2)Fororderedlists,useandfornumberedlists,customizablewiththetypeattributefordifferentnumberingstyles.

HTML in Action: Examples of Website StructureHTML in Action: Examples of Website StructureMay 05, 2025 am 12:03 AM

HTML is used to build websites with clear structure. 1) Use tags such as, and define the website structure. 2) Examples show the structure of blogs and e-commerce websites. 3) Avoid common mistakes such as incorrect label nesting. 4) Optimize performance by reducing HTTP requests and using semantic tags.

How do you insert an image into an HTML page?How do you insert an image into an HTML page?May 04, 2025 am 12:02 AM

ToinsertanimageintoanHTMLpage,usethetagwithsrcandaltattributes.1)UsealttextforaccessibilityandSEO.2)Implementsrcsetforresponsiveimages.3)Applylazyloadingwithloading="lazy"tooptimizeperformance.4)OptimizeimagesusingtoolslikeImageOptimtoreduc

HTML's Purpose: Enabling Web Browsers to Display ContentHTML's Purpose: Enabling Web Browsers to Display ContentMay 03, 2025 am 12:03 AM

The core purpose of HTML is to enable the browser to understand and display web content. 1. HTML defines the web page structure and content through tags, such as, to, etc. 2. HTML5 enhances multimedia support and introduces and tags. 3.HTML provides form elements to support user interaction. 4. Optimizing HTML code can improve web page performance, such as reducing HTTP requests and compressing HTML.

Why are HTML tags important for web development?Why are HTML tags important for web development?May 02, 2025 am 12:03 AM

HTMLtagsareessentialforwebdevelopmentastheystructureandenhancewebpages.1)Theydefinelayout,semantics,andinteractivity.2)SemantictagsimproveaccessibilityandSEO.3)Properuseoftagscanoptimizeperformanceandensurecross-browsercompatibility.

Explain the importance of using consistent coding style for HTML tags and attributes.Explain the importance of using consistent coding style for HTML tags and attributes.May 01, 2025 am 12:01 AM

A consistent HTML encoding style is important because it improves the readability, maintainability and efficiency of the code. 1) Use lowercase tags and attributes, 2) Keep consistent indentation, 3) Select and stick to single or double quotes, 4) Avoid mixing different styles in projects, 5) Use automation tools such as Prettier or ESLint to ensure consistency in styles.

How to implement multi-project carousel in Bootstrap 4?How to implement multi-project carousel in Bootstrap 4?Apr 30, 2025 pm 03:24 PM

Solution to implement multi-project carousel in Bootstrap4 Implementing multi-project carousel in Bootstrap4 is not an easy task. Although Bootstrap...

See all articles

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

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

Dreamweaver Mac version

Dreamweaver Mac version

Visual web development tools

WebStorm Mac version

WebStorm Mac version

Useful JavaScript development tools

MantisBT

MantisBT

Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.