css darken property code example

Example 1: css hover darken color

.your-css-class:hover {
    background: linear-gradient(rgba(0, 0, 0, 0.25), rgba(0, 0, 0, 0.25));
  }

Example 2: how to lighten the color of text in html

There is "opacity" which will make the background shine through:

opacity: 0.5;(change the value according to your needs)