css linear gradient color at top code example

Example 1: linear-gradient(top to bottom)

/* A gradient going from the top to bottom
   starting red and finishing orange */

.class {
    background: linear-gradient(to bottom, #f32b60, #ff8f1f);
}

Example 2: css gradient

Here a codePen with cool gradient animations:
https://codepen.io/DevLorenzo/pen/ExgpvJM