css attribute selector or code example

Example 1: css attribute selector

a[target="_blank"] {
  background-color: yellow;
}
/*w3schools*/

Example 2: css html attribut

<div class='dynamic-color' data-assigned-color='red'>lorem ipsum</div>
<div class='dynamic-color' data-assigned-color='blue'>lorem ipsum</div>
<div class='dynamic-color' data-assigned-color='green'>lorem ipsum</div>

.dynamic-color {
    color: [data-assigned-color];
}