CSS отмечает цвет
<style>
mark {
background-color: yellow;
color: black;
}
</style>
<mark>Highlighted text!!</mark>
Lazurite
<style>
mark {
background-color: yellow;
color: black;
}
</style>
<mark>Highlighted text!!</mark><p>Do not forget to buy <mark>milk</mark> today.</p>mark {
display: inline-block;
line-height: 0em;
padding-bottom: 0.5em;
}