how to set gradient background color in html code example

Example 1: gradient css background

/*From bottom to top*/
background: rgb(166,166,166);
background: linear-gradient(0deg, rgba(166,166,166,1) 0%, rgba(255,255,255,1) 29%);

Example 2: double color background css

background: linear-gradient(<angle>, color1 color1-stop-at, color2 color2-start-at);