How to write hr color of horizontal line in html

In HTML, you can use the border-color attribute to set the color of the horizontal line hr. You only need to add the "border-color: color value;" style to the hr tag. The border-color attribute is used to set the border color of an element. You can set four border colors of an element in one declaration, that is, this attribute can have one to four values.

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

The default hr tag style:

is just a black line, which is not beautiful at all. You can use the border-color property of CSS to set the color.

Rendering:

border-color attribute introduction

border-color attribute setting The four border colors of an element. This property can have one to four values.

Attribute value:

• color Specifies the background color.

• transparent Specifies that the color of the border should be transparent. This is the default

The color representation method supported by CSS3

• is represented by the English name of the color. The English name represents a color, but the representation is very limited and difficult to remember and query.
• is represented by the color ofhex. The principle of the three primary colors of color and light can be looked up in the table.
• is represented byrgb (r, g, b). The principle of three primary colors of light, red, green and blue.
• is represented byhsl (Hue, Saturation, Lightness). Hue Saturation Brightness.
• is represented byrgba (r, g, b, a). The principle of three primary colors of light, red, green, blue and transparency. a ∈ [0, 1], 0 represents complete transparency.
• is represented byhsla (Hue, Saturation, Lightness, alpha). Hue, saturation, brightness and transparency. alpha ∈ [0, 1], 0 represents complete transparency.

Example:

      
   
 
 background-color:gray 
 
 background-color:#888 
 
 background-color:#ffff00 
 
 background-color:rgb(0, 255, 255) 
 
 background-color:hsl(120, 100%, 50%) 
 
 background-color:rgba(0, 255, 255, 0.5) 
 
 background-color:hsla(120, 100%, 50%, 0.5) 
 
  

Web page display

Explanation: The reason why text is added at the end is to verify transparency.

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