html id
snippet in html

html id

user3247

<p id="newid">this is the id</p>

<style>
#newid {
  background-color: green;
  text-align: center;
}
</style>

html id

user600

<style>
#grepperHeader {
  background-color: lightblue;
  color: navy;
  padding: 40px;
  text-align: center;
}
</style>

<h1 id="grepperHeader">grepperHeader</h1>

referance html id css

user6926

<style>
  #test {
  /*Styleing here*/
  }
</style>
<h1 id="test"></h1>