How to Solid Line browser title small icon and the difference between RGB and rgbaopacity

How to implement a small icon in the browser title

We need to draw on the link tag

What are the label properties of the link tag? Rel Type href

Rel is the relationship between the current page and the URL rel= "stylesheet"

Type is the MIME type of the resource file. The MIME type of the HTML file is the MIME type of the text/html picture

The MIME type of the Image/jpg (png/gif) CSS is Text/css js and the MIME type is text/javascript.

The MIME type, the password between the client and the server, depends on the extension name.

The small icon in the title is out, the href cannot be written here.

The difference between RGB and RGBA and opacity

The RGB () Color representation method value is 0-255 such as Background:rgb (12,15,16);

Opacity indicates that the transparency value is 0-1;

Rgba () r is Red 0-255 G is the green value is 0-255 B is the blue value is 0-255 A is the opacity value is 0-1;

However, the low version of IE does not support.

What is the difference between RGB and opacity and RGBA?

The content of the former is also transparent, and the content of the latter is not transparent. The content contains pictures and text.

How to Solid Line browser title small icon and the difference between RGB and rgbaopacity