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How to set transparency color in css

青灯夜游
青灯夜游Original
2021-04-14 19:05:563833browse

Method: 1. Use the RGBA() function to generate various colors using the superposition of red, green, blue and transparency. The syntax is "rgba(red, green, blue, transparency)"; 2 , use the HSLA() function to define colors using hue, saturation, brightness, and transparency, with the syntax "hsla (hue, saturation, brightness, transparency)".

How to set transparency color in css

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

Method 1: Use the RGBA() function

rgba() function uses red (R), green (G), blue (B), and transparency (A) overlay to generate a variety of colors.

Syntax:

rgba(red, green, blue, alpha)

Attribute value:

##ValueDescription Define the red value, the value range is 0 ~ 255, you can also use the percentage 0% ~ 100%. Define the green value, the value range is 0 ~ 255, you can also use the percentage 0% ~ 100%. Define the blue value, the value range is 0 ~ 255, you can also use the percentage 0% ~ 100%. Define transparency 0 (fully transparent) ~ 1 (fully opaque)
#red
green
blue
alpha - Transparency
Example:

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<style>
#p1 {background-color:rgb(255,0,0,0.3);}
#p2 {background-color:rgb(0,255,0,0.3);}
#p3 {background-color:rgb(0,0,255,0.3);}
#p4 {background-color:rgb(192,192,192,0.3);}
#p5 {background-color:rgb(255,255,0,0.3);}
#p6 {background-color:rgb(255,0,255,0.3);}
</style>
</head>

<body>
<p>RGB 颜色，并使用透明度:</p>
<p id="p1">红色</p>
<p id="p2">绿色</p>
<p id="p3">蓝色</p>
<p id="p4">灰色</p>
<p id="p5">黄色</p>
<p id="p6">樱桃色</p>
</body>
</html>

Rendering:

How to set transparency color in css

##Method 2: Use HSLA() function

hsla() function uses hue, saturation, brightness, and transparency to define colors.

HSLA stands for Hue, Saturation, Lightness, and Transparency (English: Hue, Saturation, Lightness, Alpha).

    Hue (H) is the basic attribute of color, which is what is commonly called color name, such as red, yellow, etc.

    • Saturation (S) refers to the purity of the color. The higher it is, the purer the color is, and the lower it is, the color will gradually turn gray. It takes a value of 0-100%.

    • Brightness (L) takes 0-100%. Increase the brightness and the color will change to white; decrease the brightness, the color will change to black.

    • Transparency (A) takes a value between 0 and 1, representing transparency.

    • Syntax: 
hsla(hue, saturation, lightness, alpha)

Attribute value:

Valuehue - Huesaturation - Saturationlightness - brightnessalpha - transparency ##Example: 
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<style>
#p1 {background-color:hsla(120,100%,50%,0.3);}
#p2 {background-color:hsla(120,100%,75%,0.3);}
#p3 {background-color:hsla(120,100%,25%,0.3);}
#p4 {background-color:hsla(120,60%,70%,0.3);}
#p5 {background-color:hsla(290,100%,50%,0.3);}
#p6 {background-color:hsla(290,60%,70%,0.3);}
</style>
</head>

<body>
<p>HSL 颜色，并使用透明度:</p>
<p id="p1">绿色</p>
<p id="p2">浅绿</p>
<p id="p3">暗绿</p>
<p id="p4">柔和的绿色</p>
<p id="p5">紫色</p>
<p id="p6">柔和的紫色</p>
</body>
</html>
Description
Define hue (0 to 360) - 0 (or 360) is red, 120 is green, 240 is blue
Define saturation; 0% is gray, 100% full color
Define brightness 0% is dark, 50% is normal, 100% is white
Define transparency 0 (fully transparent) ~ 1 (fully opaque)
Rendering:

(Learning video sharing: How to set transparency color in csscss video tutorial

)

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