background: linear-gradient(0deg,#fff,#eee 20%); code example
Example 1: linear-gradient
background: linear-gradient(to left, #333, #333 50%, #eee 100%);Example 2: css linear gradient
#gradient {
background-image: linear-gradient(180deg, black, red);
}
/* can be applied in many places, as your <body> background or a <div> etc */