html how to change highlight color

1::selection {
2  background: #ffb7b7; /* WebKit/Blink Browsers */
3}
4::-moz-selection {
5  background: #ffb7b7; /* Gecko Browsers */
6}

1::-moz-selection { /* Code for Firefox */
2  color: red;
3  background: yellow;
4}
5
6::selection {
7  color: red;
8  background: yellow;
9}