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In CSS3, the hsla() function is used to define colors using hue, saturation, brightness, and transparency. The syntax is "hsla(hue value, saturation value, brightness value, transparency value)"; hue value The value range of is "0~360", the value range of saturation and brightness is "0%~100%", and the value range of transparency is "0~1".
The operating environment of this tutorial: Windows 7 system, CSS3&&HTML5 version, Dell G3 computer.
In css3, the function of hsla() is to define colors.
hsla() function uses hue, saturation, brightness, and transparency to define colors.
HSLA stands for hue, saturation, brightness, 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)
| Value | Description |
|---|---|
| ##hue - Hue | Define hue (0 to 360) - 0 (or 360) is red, 120 is green, 240 is blue|
| saturation - Saturation | Defines saturation; 0% is gray, 100% is full color|
| lightness - Lightness | Define brightness 0% is dark, 50% is normal, 100% is white|
| alpha - transparency | Define transparency 0 (fully transparent) ~ 1 (fully opaque)
<!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>
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